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Ken Krauss, Ph.D. (Former Employee)

Science and Products

Filter Total Items: 19
Mangroves on the outside of a playa within Florida Bay

Coastal Wetland Vulnerability to Climate Change and Sea-Level Rise: Understanding Ecological Thresholds and Ecosystem Transformations

Eighteen USGS coastal scientists from all four coasts of the conterminous United States are working together to advance the understanding of climate change and sea-level rise impacts to coastal wetlands.
By
California Water Science Center, Chesapeake Bay Activities, Eastern Ecological Science Center, Florence Bascom Geoscience Center, Great Lakes Science Center, Pacific Coastal and Marine Science Center, St. Petersburg Coastal and Marine Science Center, Western Ecological Research Center (WERC), Western Geographic Science Center, Wetland and Aquatic Research Center , Woods Hole Coastal and Marine Science Center
Coastal Wetland Vulnerability to Climate Change and Sea-Level Rise: Understanding Ecological Thresholds and Ecosystem Transformations

Coastal Wetland Vulnerability to Climate Change and Sea-Level Rise: Understanding Ecological Thresholds and Ecosystem Transformations

Eighteen USGS coastal scientists from all four coasts of the conterminous United States are working together to advance the understanding of climate change and sea-level rise impacts to coastal wetlands.
Learn More
Coastal Everglades

Mangrove Forest Responses to Sea-Level Rise in the Greater Everglades

USGS researchers will utilize long-term soil elevation change data to help advance understanding of soil elevation dynamics and ecological transformations within coastal wetlands of the Greater Everglades.
By
Ecosystems Mission Area, Land Management Research Program, Wetland and Aquatic Research Center
Mangrove Forest Responses to Sea-Level Rise in the Greater Everglades

Mangrove Forest Responses to Sea-Level Rise in the Greater Everglades

USGS researchers will utilize long-term soil elevation change data to help advance understanding of soil elevation dynamics and ecological transformations within coastal wetlands of the Greater Everglades.
Learn More
View of mangroves along the coast in La Parguera, Lajas, Puerto Rico.

Developing a Pacific Mangrove Monitoring Network (PACMAN) in Response to Sea Level Rise

Continued sea-level rise from a changing climate is expected to result in the loss of many coastal mangrove trees, which, will strongly affect human populations on isolated Western Pacific islands as they rely heavily on mangrove forests for food (fish, shrimp, and crabs), building materials, and firewood. Mangroves also protect local communities from tsunamis and cyclones and are...
By
Climate Adaptation Science Centers
Developing a Pacific Mangrove Monitoring Network (PACMAN) in Response to Sea Level Rise

Developing a Pacific Mangrove Monitoring Network (PACMAN) in Response to Sea Level Rise

Continued sea-level rise from a changing climate is expected to result in the loss of many coastal mangrove trees, which, will strongly affect human populations on isolated Western Pacific islands as they rely heavily on mangrove forests for food (fish, shrimp, and crabs), building materials, and firewood. Mangroves also protect local communities from tsunamis and cyclones and are important for
Learn More
Ecosystem carbon budget conceptual diagram

Carbon and Water Budgeting Along Upper Estuaries: Developing Linkages to Environmental Change

WARC Researchers are studying carbon, water, and nutrient cycling in upper estuarine wetlands.
By
Wetland and Aquatic Research Center
Carbon and Water Budgeting Along Upper Estuaries: Developing Linkages to Environmental Change

Carbon and Water Budgeting Along Upper Estuaries: Developing Linkages to Environmental Change

WARC Researchers are studying carbon, water, and nutrient cycling in upper estuarine wetlands.
Learn More
Rhizophora stylosa seedling

Assessing Environmental Stress in Mature Mangrove Stands: Linkages to Nutrient Loading

WARC Researchers are comparing tree and root growth, soil CO2 flux, and surface elevation change between fertilized and unfertilized mangrove forests to assess the potential impact of increased nutrient loading and to help rate mangrove stand vulnerability.
By
Land Management Research Program, Wetland and Aquatic Research Center
Assessing Environmental Stress in Mature Mangrove Stands: Linkages to Nutrient Loading

Assessing Environmental Stress in Mature Mangrove Stands: Linkages to Nutrient Loading

WARC Researchers are comparing tree and root growth, soil CO2 flux, and surface elevation change between fertilized and unfertilized mangrove forests to assess the potential impact of increased nutrient loading and to help rate mangrove stand vulnerability.
Learn More
LUCAS model

Wetland Carbon Working Group: Improving Methodologies and Estimates of Carbon and Greenhouse Gas Flux in Wetlands

WARC researchers are working to quantify the impacts of future climate and land use/land cover change on greenhouse gas emissions and reductions.
By
Land Management Research Program, Wetland and Aquatic Research Center , Gulf of America
Wetland Carbon Working Group: Improving Methodologies and Estimates of Carbon and Greenhouse Gas Flux in Wetlands

Wetland Carbon Working Group: Improving Methodologies and Estimates of Carbon and Greenhouse Gas Flux in Wetlands

WARC researchers are working to quantify the impacts of future climate and land use/land cover change on greenhouse gas emissions and reductions.
Learn More
Filter Total Items: 36

Hydrology data from selected Louisiana freshwater forested wetlands 2004-2022 Hydrology data from selected Louisiana freshwater forested wetlands 2004-2022

Infinity water level recorders were installed in 2004 to monitor hydrologic conditions in five freshwater forested wetlands in Louisiana: Bayou Chevreuil, Bayou Teche National Wildlife Refuge, Mandalay National Wildlife Refuge, Jean Lafitte National and Historical Park, and Treasure Island. Hourly measurements were collected continuously on a 24- hour basis through April 2022, producing...
By
Wetland and Aquatic Research Center

Predicted carbon fluxes in Lake Maurepas swamp forests under various hydrologic and salinity regimes Predicted carbon fluxes in Lake Maurepas swamp forests under various hydrologic and salinity regimes

A process-driven biogeochemistry model, Wetland Carbon Assessment Tool - DeNitrification-DeComposition model (WCAT-DNDC) was validated and applied to examine the responses of daily net ecosystem exchange (NEE), net primary productivity (NPP), ecosystem respiration (ER), methane (CH4) and nitrous oxide (N2O) emissions in the Lake Maurepas swamp forests under dry (2011), normal (2019), and...
By
Wetland and Aquatic Research Center

Projections of Elevation and Mangrove Species Cover under Sea-Level Rise across Pohnpei, Federated States of Micronesia Projections of Elevation and Mangrove Species Cover under Sea-Level Rise across Pohnpei, Federated States of Micronesia

Future sea-level rise poses a risk to mangrove forests. To better understand potential vulnerability, we developed a numerical model of soil elevation for mangrove forests. We used the model to generate projections of elevation and mangrove forest composition change under six sea-level rise scenarios from 2020 through 2150. We employed a data-driven modeling approach, utilizing new and...
By
Western Ecological Research Center (WERC)

Data to support the role of the American Alligator (Alligator mississippiensis) in coastal wetland carbon dynamics Data to support the role of the American Alligator (Alligator mississippiensis) in coastal wetland carbon dynamics

Coastal wetlands store carbon in their soils. Carbon is produced by emergent biomass and in-situ root growth, as well as deposited through sedimentation. Burial of aboveground carbon within soils and disruption of long-term soil carbon storage are both influenced by the fauna present in coastal wetlands. Data were used to test the hypothesis that the American Alligator (Alligator...
By
Ecosystems Land Change Science Program, Wetland and Aquatic Research Center

Biological and environmental data collected in 2015 within mangrove habitats of Rookery Bay Preserve on Marco Island, FL. Biological and environmental data collected in 2015 within mangrove habitats of Rookery Bay Preserve on Marco Island, FL.

Mangrove restoration efforts often focus on planting seedlings and ignore the underlying physical parameters causing mangrove loss, such as disruption to the hydrological regime. In order to determine success of hydrological restoration, baseline data need to be collected and assessed from a degraded mangrove system undergoing hydrological restoration. Sample collection occurred within...
By
Wetland and Aquatic Research Center

Treeband measurements of Taxodium distichum in coastal Louisiana, USA from August 2004 through April 2016 Treeband measurements of Taxodium distichum in coastal Louisiana, USA from August 2004 through April 2016

To study the long-term effects of hydrology and salinity on the health of these systems, we fitted dendrometer bands on selected trees in permanent forest productivity plots established between 2004 and 2006 within six baldcypress stands. Three of these stands were in freshwater sites permanently or seasonally flooded with low salinity (0.1-1.3 ppt), while the other three are affected by...
By
Ecosystems Land Change Science Program, Wetland and Aquatic Research Center
cypress tupelo swamp
Maurepas Swamp
Maurepas Swamp
cypress tupelo swamp

Maurepas Swamp

Maurepas Swamp

The Maurepas Swamp of southeastern Louisiana is a mostly flooded cypress tupelo swamp.

By
Climate Research and Development Program
cypress tupelo swamp

Maurepas Swamp

Maurepas Swamp

The Maurepas Swamp of southeastern Louisiana is a mostly flooded cypress tupelo swamp.

By
Climate Research and Development Program
Filter Total Items: 195

Rising sea level reduces carbon sequestration and CO2 and N2O fluxes while promoting CH4 flux from mangroves Rising sea level reduces carbon sequestration and CO2 and N2O fluxes while promoting CH4 flux from mangroves

Sea-level rise (SLR) may reduce mangrove carbon sequestration by increasing greenhouse gas (GHG) emissions—a key factor in forecasting the trajectory of blue carbon reserves. Nonetheless, predictions of future GHG fluxes under SLR remain uncertain. Unlike prior studies limited to controlled or single-site settings, we deploy cross-latitude “marsh-organ” designs in China to access GHG...
Authors
Peiyang Qiao, Luzhen Chen, Ken Krauss, Xudong Guo, Lian Xu, Xiaoxuan Gu, Ying Dong
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Anthropogenic activities have greatly altered mangroves over the last hundred years Anthropogenic activities have greatly altered mangroves over the last hundred years

Mangroves not only provide ecosystem and cultural services but also contribute to the mitigation of global warming. Mangrove dynamics and their environmental responses as re-constructed from the past can inform current mangrove conservation and restoration. However, our understanding of mangrove dynamics over the past century and the impact of human activities on these ecosystems remains...
Authors
Yao Zhang, Guangming Zhao, Ken Krauss, Lianghao Pan, Yuanqin Xu, Xianwei Meng
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Network of networks: Time series clustering of AmeriFlux sites Network of networks: Time series clustering of AmeriFlux sites

Environmental observation networks, such as AmeriFlux, are foundational for monitoring ecosystem response to climate change, management practices, and natural disturbances; however, their effectiveness depends on their representativeness for the regions or continents. We proposed an empirical, time series approach to quantify the similarity of ecosystem fluxes across AmeriFlux sites. We...
Authors
David E. Reed, Housen Chu, Brad Peter, Jiquan Chen, Michael Abraha, Brian Amiro, Ray Anderson, M. Altaf Arain, Paulo Arruda, Greg Barron-Gafford, Carl Bernacchi, Daniel P. Beverly, Sebastien C. Biraud, T. Black, Peter Blanken, Gil Bohrer, Rebecca Bowler, David R. Bowling, M. Syndonia Bret-Harte, Mario Bretfeld, Nathaniel A. Brunsell, Stephen H. Bullock, Gerardo Celis, Xingyuan Chen, Aimee T. Classen, David R. Cook, Alejandro Cueva, Higo Dalmagro, Kenneth Davis, Ankur Desai, Alison J. Duff, Allison L. Dunn, David Durden, Colin Edgar, Eugenie Euskirchen, Rosvel Bracho, Brent Ewers, Lawrence Flanagan, Christopher Florian, Vanessa Foord, Inke Forbrich, Brandon R. Forsythe, John Frank, Jaime Garatuza-Payan, Sarah Goslee, Christopher Gough, Mark Green, Timothy Griffis, Manuel Helbig, Andrew C. Hill, Ross Hinkle, Jason Horne, Elyn Humphreys, Hiroki Ikawa, Go Iwahana, Rachhpal Jassal, Bruce Johnson, Mark Johnson, Steven A. Kannenberg, Eric Kelsey, John King, John Knowles, Sara Knox, Hideki Kobayashi, Thomas Kolb, Randy Kolka, Ken Krauss, Lars Kutzbach, Brian Lamb, Beverly Law, Sung-Ching Lee, Xuhui Lee, Heping Liu, Henry Loescher, Sparkle Malone, Roser Matamala, Marguerite Mauritz, Stefan Metzger, Gesa Meyer, Bhaskar Mitra, J. William Munger, Zoran Nesic, Asko Noormets, Thomas L. O'Halloran, Patrick T. O'Keeffe, Steven Oberbauer, Walter Oechel, Patty Oikawa, Paulo C. Olivas, Andrew Ouimette, Gilberto Pastorello, Jorge F. Perez-Quezada, Claire Phillips, Gabriela Posse, Bo Qu, William Quinton, Michele Reba, Andrew Richardson, Valentin Picasso, Adrian V. Rocha, Julio C. Rodriguez, Roel Ruzol, Scott Saleska, Russell Scott, Adam Schreiner-McGraw, Edward A.G. Schuur, Maria Silveira, Oliver Sonnentag, David L. Spittlehouse, Ralf Staebler, Gregory Starr, Christina Staudhammer, Chris Still, Cove Sturtevant, Ryan C. Sullivan, Andy Suyker, David Trejo, Masahito Ueyama, Rodrigo Vargas, Brian Viner, Enrique Vivoni, Dong Wang, Eric Ward, Susanne Wiesner, Lisamarie Windham-Myers, David Yannick, Enrico A. Yepez, Terenzio Zenone, Junbin Zhao, Donatella Zona
By
Ecosystems Mission Area, Water Resources Mission Area, Wetland and Aquatic Research Center

Elevated CO2 enables brackish marsh transgression into freshwater forested wetlands while stimulating CH4 emissions Elevated CO2 enables brackish marsh transgression into freshwater forested wetlands while stimulating CH4 emissions

Wetlands are significant carbon (C) sinks and are expected to promote greater C assimilation as atmospheric CO2 concentrations rise. However, the fate of C with environmental change along fresh-to-oligohaline wetland transitions is not well understood. We established an ex-situ mesocosm experiment to mimic future elevated atmospheric CO2 concentrations (eCO2, 720 ppm) versus current (380...
Authors
Luzhen Chen, Donald Schoolmaster, Ken Krauss, Camille Stagg, Nicole Cormier, Rebecca Moss, Yiyi Xiong, Nathaniel B. Weston
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Ecological thresholds and transformations due to climate change: The role of abiotic stress Ecological thresholds and transformations due to climate change: The role of abiotic stress

An ecological threshold is the point at which a comparatively small environmental change triggers an abrupt and disproportionately large ecological response. In the face of accelerating climate change, there is concern that abrupt ecosystem transformations will become more widespread as critical ecological thresholds are crossed. There has been ongoing debate, however, regarding the...
Authors
Michael Osland, John B. Bradford, Lauren Toth, Matthew J. Germino, James Grace, Judith Drexler, Camille Stagg, Eric Grossman, Karen M. Thorne, Stephanie Romanach, Davina Passeri, Gregory Noe, Jessica Lacy, Ken Krauss, Kurt P. Kowalski, Glenn Guntenspergen, Neil K. Ganju, Nicholas Enwright, Joel A. Carr, Kristin Byrd, Kevin Buffington
By
Ecosystems Mission Area, Coastal and Marine Hazards and Resources Program, California Water Science Center, Eastern Ecological Science Center, Florence Bascom Geoscience Center, Forest and Rangeland Ecosystem Science Center, Pacific Coastal and Marine Science Center, Southwest Biological Science Center, St. Petersburg Coastal and Marine Science Center, Western Ecological Research Center (WERC), Western Geographic Science Center, Wetland and Aquatic Research Center , Woods Hole Coastal and Marine Science Center

American alligators (Alligator mississippiensis) as wetland ecosystem carbon stock regulators American alligators (Alligator mississippiensis) as wetland ecosystem carbon stock regulators

Blue carbon refers to organic carbon sequestered by oceanic and coastal ecosystems. This stock has gained global attention as a high organic carbon repository relative to other ecosystems. Within blue carbon ecosystems, tidally influenced wetlands alone store a disproportionately higher amount of organic carbon than other blue carbon systems. North America harbors 42% of tidally...
Authors
Christopher M. Murray, Tyler S. Coleman, Wray Gabel, Ken Krauss
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Non-USGS Publications**

Kumara, M.P., L.P. Jayatissa, K.W. Krauss, D.H. Phillips, & M. Huxham. 2010. High mangrove density enhances surface accretion, surface elevation change, and tree survival in coastal areas susceptible to sea-level rise. Oecologia 164: 545-553.
Huxham, M., M. Kumara, L. Jayatissa, K.W. Krauss, J. Kairo, J. Langat, M. Mencuccini, M. Skov & B. Kirui. 2010. Intra and inter-specific facilitation in mangroves may increase resilience to climate change threats. Philosophical Transactions of the Royal Society of London B 365: 2127-2135.
Krauss, K.W. 2009. Mangrove energetics. Ecology 90: 3588-3589. [book review]
Krauss, K.W., C.E. Lovelock, K.L. McKee, L. López-Hoffman, S.M.L. Ewe & W.P. Sousa. 2008. Environmental drivers in mangrove establishment and early development: a review. Aquatic Botany 89: 105-127.
Conner, W.H., T.W. Doyle & K.W. Krauss, Eds., 2007. Ecology of Tidal Freshwater Forested Wetlands of the Southeastern United States. Springer. 505 p.
Krauss, K.W., J.L. Chambers & D. Creech. 2007. Selection for salt tolerance in tidal freshwater swamp species: advances using baldcypress as a model for restoration. Pages 385-410 in W.H. Conner, T.W. Doyle, K.W. Krauss (eds.), Ecology of Tidal Freshwater Forested Wetlands of the Southeastern United States. Springer. 505 p.
Conner W.H., K.W. Krauss & T.W. Doyle. 2007. Ecology of tidal freshwater forests in coastal deltaic Louisiana and northeastern South Carolina. Pages 223-253 in W.H. Conner, T.W. Doyle, K.W. Krauss (eds.), Ecology of Tidal Freshwater Forested Wetlands of the Southeastern United States. Springer. 505 p.
Conner, W.H., C.T. Hackney, K.W. Krauss & J.W. Day, Jr. 2007. Tidal freshwater forested wetlands: future research needs and an overview of restoration. Pages 461-485 in W.H. Conner, T.W. Doyle, K.W. Krauss (eds.), Ecology of Tidal Freshwater Forested Wetlands of the Southeastern United States. Springer. 505 p.
Gardiner, E.S. & K.W. Krauss. 2001. Photosynthetic light response of flooded cherrybark oak (Quercus pagoda) seedlings grown in two light regimes. Tree Physiology 21: 1103-1111.
Krauss, K.W., R.A. Goyer, J.A. Allen & J.L. Chambers. 2000. Tree shelters effective in coastal swamp restoration (Louisiana). Ecological Restoration18: 200-201.
Allen, J.A., K.W. Krauss, N.C. Duke, O. Björkman, D.R. Herbst & C. Shih. 2000. Bruguiera species in Hawai’i: systematic considerations and ecological implications. Pacific Science 54: 331-343.
Doyle, T.W. & K.W. Krauss. 1999. The sands and sambars of St. Vincent Island. Florida Wildlife 53: 22-25.
Krauss, K.W., J.L. Chambers & J.A. Allen. 1998. Salinity effects and differential germination of several half-sib families of baldcypress from different seed sources. New Forests 15: 53-68.
Allen, J.A., W.H. Conner, R.A. Goyer, J.L. Chambers & K.W. Krauss. 1998. Chapter 4: Freshwater forested wetlands and global climate change. Pages 33-44 in G.R. Guntenspergen and B.A Vairin (eds.), Vulnerability of coastal wetlands in the Southeastern United States: climate change research results, 1992-97. U.S. Geological Survey, Biological Resources Division Biological Science Report USGS/BRD/BSR-1998-0002. 101 p.

**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.

Ecological Thresholds, Abiotic Stress, and Climate Change: A Conceptual Framework

Ecological Thresholds, Abiotic Stress, and Climate Change: A Conceptual Framework

As climate change accelerates, the risk of sudden, large-scale shifts in ecosystems is growing. A new USGS study examines the mechanisms behind these...

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Research to Inform Planning and Implementation of Nature-based Solutions

Research to Inform Planning and Implementation of Nature-based Solutions

A brief overview of some of the research by the program that helps support nature-based solutions to climate change.

Read Article
A temporary boost to surviving trees in tidal freshwater swamps but steadily increasing salinity associated with sea-level rise ultimately creates ‘ghost forests’

A temporary boost to surviving trees in tidal freshwater swamps but steadily increasing salinity associated with sea-level rise ultimately creates ‘ghost forests’

This article is part of the Fall 2021 issue of the Earth Science Matters Newsletter.

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Friday's Findings - September 10 2021

Friday's Findings - September 10 2021

Thresholds and Consequences of Ecophysiological Water Use in Forested Wetlands of the Southeast with Salinity: Why We Study Trees

Date: September 10...

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Considering carbon in our Nation's tidal freshwater wetlands

Considering carbon in our Nation's tidal freshwater wetlands

This article is part of the Spring 2019 issue of the Earth Science Matters Newsletter.

Read Article
Testing the Resiliency of Created Tidal Wetlands

Testing the Resiliency of Created Tidal Wetlands

This article is part of the Fall 2017 issue of the Earth Science Matters Newsletter.

Read Article

Science and Products

Filter Total Items: 19
Mangroves on the outside of a playa within Florida Bay

Coastal Wetland Vulnerability to Climate Change and Sea-Level Rise: Understanding Ecological Thresholds and Ecosystem Transformations

Eighteen USGS coastal scientists from all four coasts of the conterminous United States are working together to advance the understanding of climate change and sea-level rise impacts to coastal wetlands.
By
California Water Science Center, Chesapeake Bay Activities, Eastern Ecological Science Center, Florence Bascom Geoscience Center, Great Lakes Science Center, Pacific Coastal and Marine Science Center, St. Petersburg Coastal and Marine Science Center, Western Ecological Research Center (WERC), Western Geographic Science Center, Wetland and Aquatic Research Center , Woods Hole Coastal and Marine Science Center
Coastal Wetland Vulnerability to Climate Change and Sea-Level Rise: Understanding Ecological Thresholds and Ecosystem Transformations

Coastal Wetland Vulnerability to Climate Change and Sea-Level Rise: Understanding Ecological Thresholds and Ecosystem Transformations

Eighteen USGS coastal scientists from all four coasts of the conterminous United States are working together to advance the understanding of climate change and sea-level rise impacts to coastal wetlands.
Learn More
Coastal Everglades

Mangrove Forest Responses to Sea-Level Rise in the Greater Everglades

USGS researchers will utilize long-term soil elevation change data to help advance understanding of soil elevation dynamics and ecological transformations within coastal wetlands of the Greater Everglades.
By
Ecosystems Mission Area, Land Management Research Program, Wetland and Aquatic Research Center
Mangrove Forest Responses to Sea-Level Rise in the Greater Everglades

Mangrove Forest Responses to Sea-Level Rise in the Greater Everglades

USGS researchers will utilize long-term soil elevation change data to help advance understanding of soil elevation dynamics and ecological transformations within coastal wetlands of the Greater Everglades.
Learn More
View of mangroves along the coast in La Parguera, Lajas, Puerto Rico.

Developing a Pacific Mangrove Monitoring Network (PACMAN) in Response to Sea Level Rise

Continued sea-level rise from a changing climate is expected to result in the loss of many coastal mangrove trees, which, will strongly affect human populations on isolated Western Pacific islands as they rely heavily on mangrove forests for food (fish, shrimp, and crabs), building materials, and firewood. Mangroves also protect local communities from tsunamis and cyclones and are...
By
Climate Adaptation Science Centers
Developing a Pacific Mangrove Monitoring Network (PACMAN) in Response to Sea Level Rise

Developing a Pacific Mangrove Monitoring Network (PACMAN) in Response to Sea Level Rise

Continued sea-level rise from a changing climate is expected to result in the loss of many coastal mangrove trees, which, will strongly affect human populations on isolated Western Pacific islands as they rely heavily on mangrove forests for food (fish, shrimp, and crabs), building materials, and firewood. Mangroves also protect local communities from tsunamis and cyclones and are important for
Learn More
Ecosystem carbon budget conceptual diagram

Carbon and Water Budgeting Along Upper Estuaries: Developing Linkages to Environmental Change

WARC Researchers are studying carbon, water, and nutrient cycling in upper estuarine wetlands.
By
Wetland and Aquatic Research Center
Carbon and Water Budgeting Along Upper Estuaries: Developing Linkages to Environmental Change

Carbon and Water Budgeting Along Upper Estuaries: Developing Linkages to Environmental Change

WARC Researchers are studying carbon, water, and nutrient cycling in upper estuarine wetlands.
Learn More
Rhizophora stylosa seedling

Assessing Environmental Stress in Mature Mangrove Stands: Linkages to Nutrient Loading

WARC Researchers are comparing tree and root growth, soil CO2 flux, and surface elevation change between fertilized and unfertilized mangrove forests to assess the potential impact of increased nutrient loading and to help rate mangrove stand vulnerability.
By
Land Management Research Program, Wetland and Aquatic Research Center
Assessing Environmental Stress in Mature Mangrove Stands: Linkages to Nutrient Loading

Assessing Environmental Stress in Mature Mangrove Stands: Linkages to Nutrient Loading

WARC Researchers are comparing tree and root growth, soil CO2 flux, and surface elevation change between fertilized and unfertilized mangrove forests to assess the potential impact of increased nutrient loading and to help rate mangrove stand vulnerability.
Learn More
LUCAS model

Wetland Carbon Working Group: Improving Methodologies and Estimates of Carbon and Greenhouse Gas Flux in Wetlands

WARC researchers are working to quantify the impacts of future climate and land use/land cover change on greenhouse gas emissions and reductions.
By
Land Management Research Program, Wetland and Aquatic Research Center , Gulf of America
Wetland Carbon Working Group: Improving Methodologies and Estimates of Carbon and Greenhouse Gas Flux in Wetlands

Wetland Carbon Working Group: Improving Methodologies and Estimates of Carbon and Greenhouse Gas Flux in Wetlands

WARC researchers are working to quantify the impacts of future climate and land use/land cover change on greenhouse gas emissions and reductions.
Learn More
Filter Total Items: 36

Hydrology data from selected Louisiana freshwater forested wetlands 2004-2022 Hydrology data from selected Louisiana freshwater forested wetlands 2004-2022

Infinity water level recorders were installed in 2004 to monitor hydrologic conditions in five freshwater forested wetlands in Louisiana: Bayou Chevreuil, Bayou Teche National Wildlife Refuge, Mandalay National Wildlife Refuge, Jean Lafitte National and Historical Park, and Treasure Island. Hourly measurements were collected continuously on a 24- hour basis through April 2022, producing...
By
Wetland and Aquatic Research Center

Predicted carbon fluxes in Lake Maurepas swamp forests under various hydrologic and salinity regimes Predicted carbon fluxes in Lake Maurepas swamp forests under various hydrologic and salinity regimes

A process-driven biogeochemistry model, Wetland Carbon Assessment Tool - DeNitrification-DeComposition model (WCAT-DNDC) was validated and applied to examine the responses of daily net ecosystem exchange (NEE), net primary productivity (NPP), ecosystem respiration (ER), methane (CH4) and nitrous oxide (N2O) emissions in the Lake Maurepas swamp forests under dry (2011), normal (2019), and...
By
Wetland and Aquatic Research Center

Projections of Elevation and Mangrove Species Cover under Sea-Level Rise across Pohnpei, Federated States of Micronesia Projections of Elevation and Mangrove Species Cover under Sea-Level Rise across Pohnpei, Federated States of Micronesia

Future sea-level rise poses a risk to mangrove forests. To better understand potential vulnerability, we developed a numerical model of soil elevation for mangrove forests. We used the model to generate projections of elevation and mangrove forest composition change under six sea-level rise scenarios from 2020 through 2150. We employed a data-driven modeling approach, utilizing new and...
By
Western Ecological Research Center (WERC)

Data to support the role of the American Alligator (Alligator mississippiensis) in coastal wetland carbon dynamics Data to support the role of the American Alligator (Alligator mississippiensis) in coastal wetland carbon dynamics

Coastal wetlands store carbon in their soils. Carbon is produced by emergent biomass and in-situ root growth, as well as deposited through sedimentation. Burial of aboveground carbon within soils and disruption of long-term soil carbon storage are both influenced by the fauna present in coastal wetlands. Data were used to test the hypothesis that the American Alligator (Alligator...
By
Ecosystems Land Change Science Program, Wetland and Aquatic Research Center

Biological and environmental data collected in 2015 within mangrove habitats of Rookery Bay Preserve on Marco Island, FL. Biological and environmental data collected in 2015 within mangrove habitats of Rookery Bay Preserve on Marco Island, FL.

Mangrove restoration efforts often focus on planting seedlings and ignore the underlying physical parameters causing mangrove loss, such as disruption to the hydrological regime. In order to determine success of hydrological restoration, baseline data need to be collected and assessed from a degraded mangrove system undergoing hydrological restoration. Sample collection occurred within...
By
Wetland and Aquatic Research Center

Treeband measurements of Taxodium distichum in coastal Louisiana, USA from August 2004 through April 2016 Treeband measurements of Taxodium distichum in coastal Louisiana, USA from August 2004 through April 2016

To study the long-term effects of hydrology and salinity on the health of these systems, we fitted dendrometer bands on selected trees in permanent forest productivity plots established between 2004 and 2006 within six baldcypress stands. Three of these stands were in freshwater sites permanently or seasonally flooded with low salinity (0.1-1.3 ppt), while the other three are affected by...
By
Ecosystems Land Change Science Program, Wetland and Aquatic Research Center
cypress tupelo swamp
Maurepas Swamp
Maurepas Swamp
cypress tupelo swamp

Maurepas Swamp

Maurepas Swamp

The Maurepas Swamp of southeastern Louisiana is a mostly flooded cypress tupelo swamp.

By
Climate Research and Development Program
cypress tupelo swamp

Maurepas Swamp

Maurepas Swamp

The Maurepas Swamp of southeastern Louisiana is a mostly flooded cypress tupelo swamp.

By
Climate Research and Development Program
Filter Total Items: 195

Rising sea level reduces carbon sequestration and CO2 and N2O fluxes while promoting CH4 flux from mangroves Rising sea level reduces carbon sequestration and CO2 and N2O fluxes while promoting CH4 flux from mangroves

Sea-level rise (SLR) may reduce mangrove carbon sequestration by increasing greenhouse gas (GHG) emissions—a key factor in forecasting the trajectory of blue carbon reserves. Nonetheless, predictions of future GHG fluxes under SLR remain uncertain. Unlike prior studies limited to controlled or single-site settings, we deploy cross-latitude “marsh-organ” designs in China to access GHG...
Authors
Peiyang Qiao, Luzhen Chen, Ken Krauss, Xudong Guo, Lian Xu, Xiaoxuan Gu, Ying Dong
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Anthropogenic activities have greatly altered mangroves over the last hundred years Anthropogenic activities have greatly altered mangroves over the last hundred years

Mangroves not only provide ecosystem and cultural services but also contribute to the mitigation of global warming. Mangrove dynamics and their environmental responses as re-constructed from the past can inform current mangrove conservation and restoration. However, our understanding of mangrove dynamics over the past century and the impact of human activities on these ecosystems remains...
Authors
Yao Zhang, Guangming Zhao, Ken Krauss, Lianghao Pan, Yuanqin Xu, Xianwei Meng
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Network of networks: Time series clustering of AmeriFlux sites Network of networks: Time series clustering of AmeriFlux sites

Environmental observation networks, such as AmeriFlux, are foundational for monitoring ecosystem response to climate change, management practices, and natural disturbances; however, their effectiveness depends on their representativeness for the regions or continents. We proposed an empirical, time series approach to quantify the similarity of ecosystem fluxes across AmeriFlux sites. We...
Authors
David E. Reed, Housen Chu, Brad Peter, Jiquan Chen, Michael Abraha, Brian Amiro, Ray Anderson, M. Altaf Arain, Paulo Arruda, Greg Barron-Gafford, Carl Bernacchi, Daniel P. Beverly, Sebastien C. Biraud, T. Black, Peter Blanken, Gil Bohrer, Rebecca Bowler, David R. Bowling, M. Syndonia Bret-Harte, Mario Bretfeld, Nathaniel A. Brunsell, Stephen H. Bullock, Gerardo Celis, Xingyuan Chen, Aimee T. Classen, David R. Cook, Alejandro Cueva, Higo Dalmagro, Kenneth Davis, Ankur Desai, Alison J. Duff, Allison L. Dunn, David Durden, Colin Edgar, Eugenie Euskirchen, Rosvel Bracho, Brent Ewers, Lawrence Flanagan, Christopher Florian, Vanessa Foord, Inke Forbrich, Brandon R. Forsythe, John Frank, Jaime Garatuza-Payan, Sarah Goslee, Christopher Gough, Mark Green, Timothy Griffis, Manuel Helbig, Andrew C. Hill, Ross Hinkle, Jason Horne, Elyn Humphreys, Hiroki Ikawa, Go Iwahana, Rachhpal Jassal, Bruce Johnson, Mark Johnson, Steven A. Kannenberg, Eric Kelsey, John King, John Knowles, Sara Knox, Hideki Kobayashi, Thomas Kolb, Randy Kolka, Ken Krauss, Lars Kutzbach, Brian Lamb, Beverly Law, Sung-Ching Lee, Xuhui Lee, Heping Liu, Henry Loescher, Sparkle Malone, Roser Matamala, Marguerite Mauritz, Stefan Metzger, Gesa Meyer, Bhaskar Mitra, J. William Munger, Zoran Nesic, Asko Noormets, Thomas L. O'Halloran, Patrick T. O'Keeffe, Steven Oberbauer, Walter Oechel, Patty Oikawa, Paulo C. Olivas, Andrew Ouimette, Gilberto Pastorello, Jorge F. Perez-Quezada, Claire Phillips, Gabriela Posse, Bo Qu, William Quinton, Michele Reba, Andrew Richardson, Valentin Picasso, Adrian V. Rocha, Julio C. Rodriguez, Roel Ruzol, Scott Saleska, Russell Scott, Adam Schreiner-McGraw, Edward A.G. Schuur, Maria Silveira, Oliver Sonnentag, David L. Spittlehouse, Ralf Staebler, Gregory Starr, Christina Staudhammer, Chris Still, Cove Sturtevant, Ryan C. Sullivan, Andy Suyker, David Trejo, Masahito Ueyama, Rodrigo Vargas, Brian Viner, Enrique Vivoni, Dong Wang, Eric Ward, Susanne Wiesner, Lisamarie Windham-Myers, David Yannick, Enrico A. Yepez, Terenzio Zenone, Junbin Zhao, Donatella Zona
By
Ecosystems Mission Area, Water Resources Mission Area, Wetland and Aquatic Research Center

Elevated CO2 enables brackish marsh transgression into freshwater forested wetlands while stimulating CH4 emissions Elevated CO2 enables brackish marsh transgression into freshwater forested wetlands while stimulating CH4 emissions

Wetlands are significant carbon (C) sinks and are expected to promote greater C assimilation as atmospheric CO2 concentrations rise. However, the fate of C with environmental change along fresh-to-oligohaline wetland transitions is not well understood. We established an ex-situ mesocosm experiment to mimic future elevated atmospheric CO2 concentrations (eCO2, 720 ppm) versus current (380...
Authors
Luzhen Chen, Donald Schoolmaster, Ken Krauss, Camille Stagg, Nicole Cormier, Rebecca Moss, Yiyi Xiong, Nathaniel B. Weston
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Ecological thresholds and transformations due to climate change: The role of abiotic stress Ecological thresholds and transformations due to climate change: The role of abiotic stress

An ecological threshold is the point at which a comparatively small environmental change triggers an abrupt and disproportionately large ecological response. In the face of accelerating climate change, there is concern that abrupt ecosystem transformations will become more widespread as critical ecological thresholds are crossed. There has been ongoing debate, however, regarding the...
Authors
Michael Osland, John B. Bradford, Lauren Toth, Matthew J. Germino, James Grace, Judith Drexler, Camille Stagg, Eric Grossman, Karen M. Thorne, Stephanie Romanach, Davina Passeri, Gregory Noe, Jessica Lacy, Ken Krauss, Kurt P. Kowalski, Glenn Guntenspergen, Neil K. Ganju, Nicholas Enwright, Joel A. Carr, Kristin Byrd, Kevin Buffington
By
Ecosystems Mission Area, Coastal and Marine Hazards and Resources Program, California Water Science Center, Eastern Ecological Science Center, Florence Bascom Geoscience Center, Forest and Rangeland Ecosystem Science Center, Pacific Coastal and Marine Science Center, Southwest Biological Science Center, St. Petersburg Coastal and Marine Science Center, Western Ecological Research Center (WERC), Western Geographic Science Center, Wetland and Aquatic Research Center , Woods Hole Coastal and Marine Science Center

American alligators (Alligator mississippiensis) as wetland ecosystem carbon stock regulators American alligators (Alligator mississippiensis) as wetland ecosystem carbon stock regulators

Blue carbon refers to organic carbon sequestered by oceanic and coastal ecosystems. This stock has gained global attention as a high organic carbon repository relative to other ecosystems. Within blue carbon ecosystems, tidally influenced wetlands alone store a disproportionately higher amount of organic carbon than other blue carbon systems. North America harbors 42% of tidally...
Authors
Christopher M. Murray, Tyler S. Coleman, Wray Gabel, Ken Krauss
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Non-USGS Publications**

Kumara, M.P., L.P. Jayatissa, K.W. Krauss, D.H. Phillips, & M. Huxham. 2010. High mangrove density enhances surface accretion, surface elevation change, and tree survival in coastal areas susceptible to sea-level rise. Oecologia 164: 545-553.
Huxham, M., M. Kumara, L. Jayatissa, K.W. Krauss, J. Kairo, J. Langat, M. Mencuccini, M. Skov & B. Kirui. 2010. Intra and inter-specific facilitation in mangroves may increase resilience to climate change threats. Philosophical Transactions of the Royal Society of London B 365: 2127-2135.
Krauss, K.W. 2009. Mangrove energetics. Ecology 90: 3588-3589. [book review]
Krauss, K.W., C.E. Lovelock, K.L. McKee, L. López-Hoffman, S.M.L. Ewe & W.P. Sousa. 2008. Environmental drivers in mangrove establishment and early development: a review. Aquatic Botany 89: 105-127.
Conner, W.H., T.W. Doyle & K.W. Krauss, Eds., 2007. Ecology of Tidal Freshwater Forested Wetlands of the Southeastern United States. Springer. 505 p.
Krauss, K.W., J.L. Chambers & D. Creech. 2007. Selection for salt tolerance in tidal freshwater swamp species: advances using baldcypress as a model for restoration. Pages 385-410 in W.H. Conner, T.W. Doyle, K.W. Krauss (eds.), Ecology of Tidal Freshwater Forested Wetlands of the Southeastern United States. Springer. 505 p.
Conner W.H., K.W. Krauss & T.W. Doyle. 2007. Ecology of tidal freshwater forests in coastal deltaic Louisiana and northeastern South Carolina. Pages 223-253 in W.H. Conner, T.W. Doyle, K.W. Krauss (eds.), Ecology of Tidal Freshwater Forested Wetlands of the Southeastern United States. Springer. 505 p.
Conner, W.H., C.T. Hackney, K.W. Krauss & J.W. Day, Jr. 2007. Tidal freshwater forested wetlands: future research needs and an overview of restoration. Pages 461-485 in W.H. Conner, T.W. Doyle, K.W. Krauss (eds.), Ecology of Tidal Freshwater Forested Wetlands of the Southeastern United States. Springer. 505 p.
Gardiner, E.S. & K.W. Krauss. 2001. Photosynthetic light response of flooded cherrybark oak (Quercus pagoda) seedlings grown in two light regimes. Tree Physiology 21: 1103-1111.
Krauss, K.W., R.A. Goyer, J.A. Allen & J.L. Chambers. 2000. Tree shelters effective in coastal swamp restoration (Louisiana). Ecological Restoration18: 200-201.
Allen, J.A., K.W. Krauss, N.C. Duke, O. Björkman, D.R. Herbst & C. Shih. 2000. Bruguiera species in Hawai’i: systematic considerations and ecological implications. Pacific Science 54: 331-343.
Doyle, T.W. & K.W. Krauss. 1999. The sands and sambars of St. Vincent Island. Florida Wildlife 53: 22-25.
Krauss, K.W., J.L. Chambers & J.A. Allen. 1998. Salinity effects and differential germination of several half-sib families of baldcypress from different seed sources. New Forests 15: 53-68.
Allen, J.A., W.H. Conner, R.A. Goyer, J.L. Chambers & K.W. Krauss. 1998. Chapter 4: Freshwater forested wetlands and global climate change. Pages 33-44 in G.R. Guntenspergen and B.A Vairin (eds.), Vulnerability of coastal wetlands in the Southeastern United States: climate change research results, 1992-97. U.S. Geological Survey, Biological Resources Division Biological Science Report USGS/BRD/BSR-1998-0002. 101 p.

**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.

Ecological Thresholds, Abiotic Stress, and Climate Change: A Conceptual Framework

Ecological Thresholds, Abiotic Stress, and Climate Change: A Conceptual Framework

As climate change accelerates, the risk of sudden, large-scale shifts in ecosystems is growing. A new USGS study examines the mechanisms behind these...

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Research to Inform Planning and Implementation of Nature-based Solutions

Research to Inform Planning and Implementation of Nature-based Solutions

A brief overview of some of the research by the program that helps support nature-based solutions to climate change.

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A temporary boost to surviving trees in tidal freshwater swamps but steadily increasing salinity associated with sea-level rise ultimately creates ‘ghost forests’

A temporary boost to surviving trees in tidal freshwater swamps but steadily increasing salinity associated with sea-level rise ultimately creates ‘ghost forests’

This article is part of the Fall 2021 issue of the Earth Science Matters Newsletter.

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Friday's Findings - September 10 2021

Friday's Findings - September 10 2021

Thresholds and Consequences of Ecophysiological Water Use in Forested Wetlands of the Southeast with Salinity: Why We Study Trees

Date: September 10...

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Considering carbon in our Nation's tidal freshwater wetlands

Considering carbon in our Nation's tidal freshwater wetlands

This article is part of the Spring 2019 issue of the Earth Science Matters Newsletter.

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Testing the Resiliency of Created Tidal Wetlands

Testing the Resiliency of Created Tidal Wetlands

This article is part of the Fall 2017 issue of the Earth Science Matters Newsletter.

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