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Year Published: 2019

A food web modeling assessment of Asian Carp impacts in the Middle and Upper Mississippi River, USA

The invasion of non-native fishes has caused a great detriment to many of our native fishes. Since the introduction of invasive carps, such as Silver, Bighead, Common and Grass Carp, managers and researcher have been struggling to remove these species while also hypothesizing the detriment of further invasion. This study developed a food web...

Kramer, Nicholas W.; Phelps, Quinton E.; Pierce, Clay; Colvin, Michael E.

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Year Published: 2019

Invertebrate prey contributions to juvenile Coho Salmon diet from riparian habitats along three Alaska streams: Implications for environmental change

Stream fish rely on a mix of terrestrial and aquatic prey sources. While the importance of terrestrial invertebrates as a food source for stream fish is well documented, the role of aquatic insects that emerge from the stream as winged adult insects (aquatic winged adults) and return to the stream as prey is less understood. In this study we...

Grunblatt, Jess; Meyer, Benjamin E.; Wipfli, Mark S.

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Year Published: 2019

Influence of climate change and postdelisting management on long-term population viability of the conservation-reliant Kirtland's Warbler

Rapid global climate change is resulting in novel abiotic and biotic conditions and interactions. Identifying management strategies that maximize probability of long-term persistence requires an understanding of the vulnerability of species to environmental changes. We sought to quantify the vulnerability of Kirtland's Warbler (Setophaga...

Brown, Donald J.; Donner, Deahn M.; Ribic, Christine; Bocetti, Carol I.

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Year Published: 2019

Distribution and movement of steelhead and anglers in the Clearwater River, Idaho

Steelhead Oncorhynchus mykiss is a species that is of high economic value that supports popular sport fisheries across the Pacific Northwest. The Clearwater River in Idaho provides a trophy steelhead fishery, and it is home to both wild- and hatchery-origin steelhead. To manage the fishery effectively, information is needed about the...

Feeken, Stacey F; Bowersox, Brett J.; Dobos, Marika E.; Corsi, Matthew P.; Quist, Michael C.; Copeland, Timothy

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Year Published: 2019

Population estimates of Antillean manatees in Puerto Rico: An analytical framework for aerial surveys using multi-pass removal sampling

Effective management of the threatened Antillean manatee (Trichechus manatus manatus) in Puerto Rico requires reliable estimates of population size. Estimates are needed to assess population responses to management actions, and whether recovery objectives have been met. Aerial surveys have been conducted since 1976, but none adjusted for imperfect...

Collazo, Jaime A.; Krachey, M.J.; Pollock, K.H.; Pérez-Aguilo, F.J.; Zegarra, J.P.; Mignucci-Giannoni, A.A.

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Year Published: 2019

Demographic factors affecting population growth in giant gartersnakes

Demographic models provide insight into which vital rates and life stages contribute most to population growth. Integral projection models (IPMs) offer flexibility in matching model structure to a species’ demography. For many rare species, data are lacking for key vital rates, and uncertainty might dissuade researchers from attempting to build a...

Rose, Jonathan P.; Ersan, Julia; Wylie, Glenn D.; Casazza, Michael L.; Halstead, Brian J.

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Year Published: 2019

Ecological health indicators

Contemporary policymakers rarely stress ecological knowledge, and yet this knowledge remains crucial—just as it was in prehistory—to protecting overall human well-being. Measuring carefully selected ecological health indicators—that is, signs or symptoms, especially those focused on biotic assemblages—can provide insights into the...

Angermeier, Paul L.

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Year Published: 2019

Trade-offs relating to grassland and forest mine reclamation approaches in the central Appalachian region and its implications for the songbird community

Surface mining in the Appalachian region, USA, converts large areas of mature forest to early-successional habitat. This shift in landscape structure has the potential to reduce habitat availability and suitability for forest-dwelling songbirds by reducing and fragmenting mature forest, but also to increase habitat availability for grassland and...

Wood, Petra B.; Eric L. Margenau; Cathy A. Weakland; Donald J. Brown
Margenau, Eric L.; Wood, Petra B.; Weakland, Cathy A.; Brown, Donald J. 2019. Trade-offs relating to grassland and forest mine reclamation approaches in the central Appalachian region and implications for the songbird community. Avian Conservation and Ecology. 14(1) 2. 14 p. https://doi.org/10.5751/ACE-01304-140102.

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Year Published: 2019

Population dynamics and evaluation of management scenarios for white sturgeon in the Sacramento-San Joaquin River basin

Recent surveys suggest a declining population of White Sturgeon Acipenser transmontanus in the Sacramento–San Joaquin River basin (SSJ), California. Probable reasons for the decline include overharvest and habitat degradation compounded by poor recruitment during recent droughts. Despite the importance and status of White Sturgeon,...

Blackburn, Shannon E.; Gingras, Marty L.; DuBois, Jason; Jackson, Zachary J.; Quist, Michael C.

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Year Published: 2019

Spatial and temporal variation of ecosystem properties at macroscales

Although spatial and temporal variation in ecological properties has been well-studied, crucial knowledge gaps remain for studies conducted at macroscales and for ecosystem properties related to material and energy. We test four propositions of spatial and temporal variation in ecosystem properties within a macroscale (1000 km's) extent. We...

Soranno, Patricia A.; Wagner, Tyler; Collins, Sarah M.; Lapierre, Jean-Francois; Oliver, Samantha

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Year Published: 2019

Bayesian statistics for beginners: A step-by-step approach

Bayesian statistics is currently undergoing something of a renaissance. At its heart is a method of statistical inference in which Bayes' theorem is used to update the probability for a hypothesis as more evidence or information becomes available. It is an approach that is ideally suited to making initial assessments based on incomplete or...

Donovan, Therese M.; Mickey, Ruth M.

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Year Published: 2019

Interactions of human-caused mortality, genetic introgression, and management among Wild Red Wolves: Developing scientific consensus

After being nearly driven to extinction by the combination of human persecution, human-caused habitat change, and subsequent hybridization with coyotes, red wolves (Canis rufus) were rescued from extinction by the establishment of a captive breeding program in 1973.  In 1987, red wolves were first released into a coyote-free (Canis latrans)...

Collazo, Jaime