Western Geographic Science Center

Publications

Filter Total Items: 397
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Year Published: 2021

Trait-based filtering mediates the effects of realistic biodiversity losses on ecosystem functioning

Biodiversity losses are a major driver of global changes in ecosystem functioning. While most studies of the relationship between biodiversity and ecosystem functioning have examined randomized species losses, trait-based filtering associated with species-specific vulnerability to drivers of diversity loss can strongly influence how ecosystem...

Wolf, Amelia A.; Funk, Jennifer L; Selmants, Paul; Morozumi, Connor N; Hernandez, Daniel L.; Pasari, Jae R; Zavaleta, Erika S

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Year Published: 2021

Hyperspectral narrowband data propel gigantic leap in the earth remote sensing

Hyperspectral narrowbands (HNBs) capture data as nearly continuous “spectral signatures” rather than a “few spectral data points” along the electromagnetic spectrum as with multispectral broadbands (MBBs). Almost all of satellite remote sensing of the Earth in the twentieth century was conducted using MBB data from sensors such as the Landsat-...

Thenkabail, Prasad; Aneece, Itiya; Teluguntla, Pardhasaradhi; Oliphant, Adam

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Year Published: 2021

A new remote sensing-based Carbon Sequestration Potential Index (CSPI): A tool to support land carbon management

Integrating remote sensing into assessments of carbon stocks and fluxes has advanced our understanding of how global change affects landscapes and our capacity to support decision making about forest management. However, there remains a lack of detailed and actionable analyses conducted across widely ranging environmental conditions that are...

Pascual, Adrian; Giardina, Christian P.; Selmants, Paul; Laramee, Leah J; Asner, Gregory P.

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Year Published: 2021

Coral reef resilience differs among islands within the Gulf of Mannar, southeast India, following successive coral bleaching events

We used a 12-yr data set of benthic cover (2005–2017), spanning two bleaching events, to assess changes in benthic cover and coral community composition along 21 islands within Gulf of Mannar (GoM), southeast India. Overall, between 2005 and 2017 reefs had a simultaneous decrease in relative coral cover (avg. =  − 36%) and increase in algal cover...

Raj, K Diraviya; Aeby, Greta S.; Mathews, G.M.; Williams, Gareth J; Caldwell, Jamie M.; Laju, R L; Bharath, M Selva; Kumar, P Dinesh; Arasamuthu, A; Asir, N Gladwin Gnana; Wedding, Lisa M.; Daview, Andrew; Moritsch, Monica Mei Jeen; Edward, J K Patterson

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Year Published: 2021

Expansion of intertidal mussel beds following disease-driven reduction of a keystone predator

Disease shapes community composition by removing species with strong interactions. To test whether the absence of keystone predation due to disease produced changes to the species composition of rocky intertidal communities, we leverage a natural experiment involving mass mortality of the keystone predator Pisaster ochraceus from Sea Star Wasting...

Moritsch, Monica Mei Jeen

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Year Published: 2021

Editorial: Combining the science and practice of restoration ecology-Case studies of a grassroots binational restoration collaborative in the Madrean Archipelago Ecoregion (2014- 2019)

The Sky Island Restoration Collaborative (SIRC) is a growing partnership between government agencies, nonprofit organizations, and private landowners in southeast Arizona, the United States, and northern Sonora, Mexico. Starting in 2014 as an experiment to cultivate restoration efforts by connecting people across vocations and nations, SIRC has...

Norman, Laura M.; Pulliam, H. Ronald; Girard, Michele; Buckley, Steven M.; Misztal, Louise W.; Seibert, David; Campbell, Carianne; Callegary, James B.; Tosline, Deborah J.; Wilson, Natalie R.; Hodges, David; Conn, Jeff; Austin-Clark, A. Valer

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Year Published: 2021

Remote sensing analysis to quantify change in woodland canopy cover on the San Carlos Apache Reservation, Arizona (1935 vs. 2017)

Since the late 1800s, pinyon–juniper woodland across the western U.S. has increased in density and areal extent and encroached into former grassland areas. The San Carlos Apache Tribe wants to gain qualitative and quantitative information on the historical conditions of their tribal woodlands to use as a baseline for restoration efforts. At the...

Middleton, Barry R.; Norman, Laura M.

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Year Published: 2021

Editorial: Science and applications of coastal remote sensing

No abstract available.

Turpie, Kevin R.; Ackleson, Steven G.; Byrd, Kristin B.; Moisan, Tiffany K.

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Year Published: 2021

Preliminary assessment of carbon and nitrogen sequestration potential of wildfire-derived sediments stored by erosion control structures in forest ecosystems, southwest USA

The role of pyrogenic carbon (PyC) in the global carbon cycle is still incompletely characterized. Much work has been done to characterize PyC on landforms and in soils where it originates or in “terminal” reservoirs such as marine sediments. Less is known about intermediate reservoirs such as streams and rivers, and few studies have characterized...

Callegary, James B.; Norman, Laura M.; Eastoe, Christopher J.; Sankey, Joel B.; Youberg, Ann

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Year Published: 2021

Augmented normalized difference water index for improved monitoring of surface water

We present a comprehensive critical review of well-established satellite remote sensing water indices and offer a novel, robust Augmented Normalized Difference Water Index (ANDWI). ANDWI employs an expanded set of spectral bands, RGB, NIR, and SWIR1-2, to maximize the contrast between water and non-water pixels. Further, we...

Rad, Arash Modaresi; Kreitler, Jason R.; Sadegh, Mojitaba

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Year Published: 2021

Estimating blue carbon sequestration under coastal management scenarios

Restoring and protecting “blue carbon” ecosystems - mangrove forests, tidal marshes, and seagrass meadows - are actions considered for increasing global carbon sequestration. To improve understanding of which management actions produce the greatest gains in sequestration, we used a spatially explicit model to compare...

Moritsch, Monica Mei Jeen; Young, Mary Alida; Carnell, Paul; Macreadie, Peter I; Lovelock, Catherine E.; Nicholson, Emily; Raimondi, Peter T.; Wedding, Lisa M.; Ierodiaconou, Daniel

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Year Published: 2021

Sediment mobility and river corridor assessment for a 140-kilometer segment of the main-stem Klamath River below Iron Gate Dam, California

This river corridor assessment documents sediment mobility and river response to flood disturbance along a 140-kilometer segment of the main-stem Klamath River below Iron Gate Dam, California. Field and remote sensing methods were used to assess fundamental indicators of active sediment transport and river response to a combination of natural...

Curtis, Jennifer; Poitras, Travis; Bond, Sandra; Byrd, Kristin
Curtis, J., Poitras, T., Bond, S., and Byrd, K., 2021, Sediment mobility and river corridor assessment for a 140-kilometer segment of the main-stem Klamath River below Iron Gate Dam, California: U.S. Geological Survey Open-File Report 2020–1141, 38 p., https://doi.org/10.3133/ofr20201141.