A5035531186- Fish Ecology and Management Studies
- Hydrology and Sediment Transport Processes
- Wildlife Ecology and Conservation
- Species Distribution and Climate Change
- Rangeland and Wildlife Management
- Hydrology and Watershed Management Studies
- Soil erosion and sediment transport
- Remote Sensing and LiDAR Applications
- Land Use and Ecosystem Services
- Avian ecology and behavior
- Wildlife-Road Interactions and Conservation
- Automated Road and Building Extraction
- Fire effects on ecosystems
- Flood Risk Assessment and Management
- Ecology and Vegetation Dynamics Studies
- Evolutionary Game Theory and Cooperation
- Isotope Analysis in Ecology
- Ecosystem dynamics and resilience
- Tree-ring climate responses
- Fish biology, ecology, and behavior
- Forest Biomass Utilization and Management
- Ecology and biodiversity studies
- Peatlands and Wetlands Ecology
- Geology and Paleoclimatology Research
- Fish Biology and Ecology Studies
Trout Unlimited
2011-2021
Forest and Rangeland Ecosystem Science Center
2011-2013
United States Geological Survey
2011-2013
Duke University
2010
Significance In Bali, the cooperative management of rice terraces extends beyond villages to whole watersheds. To understand why, we created a model that explores how cooperation can propagate from pairs individuals extended groups, creating resilient system bottom-up both increases and equalizes harvests. Spatial patterns collective crop management—observable in Google Earth—closely match predictions model. The spatial patterning emerges is nonuniform scale-free. Although parameters here...
Lacking long‐term dendrochronological and lake sediment data, little is known regarding the history of fire in southern Appalachian forests through Holocene. Here we used 82 radiocarbon ages for soil charcoal collected from local depositional sites along a topographic gradient mixed hardwood ( Liriodendron tulipifera Quercus spp.) to oak–pine prinus Pinus rigida ) forest provide coarse‐grained picture changes frequency within 10‐ha area during Charcoal ranged 0 10 570 yr BP, with single date...
Abstract Population growth and increasing water‐use pressures threaten California's freshwater ecosystems have led many native fishes to the brink of extinction. To guide fish conservation efforts, we provide first systematic prioritization river catchments identify those that disproportionately contribute taxonomic diversity. Using high‐resolution range maps exceptional quality, also assess representation taxa within state's protected areas examine concordance high‐priority with existing...
The recently promulgated Navigable Waters Protection Rule eliminates federal protection for ephemeral streams previously covered by the Clean Water Act in USA, but regulatory agencies assert that map limitations preclude any quantification of scope and extent affected surface waters. However, stream channels, which only flow direct response to precipitation events are important contributors water quality aquatic ecosystems, have been subject extensive mapping efforts do allow basic...
The ranges and abundances of species that depend on freshwater habitats are declining worldwide. Efforts to counteract those trends often hampered by a lack information about distribution conservation status strongly biased toward few well-studied groups. We identified the 3,906 vascular plants, macroinvertebrates, vertebrates native California, USA, fresh water for at least one stage their life history. evaluated these taxa using existing government non-governmental organization assessments...
Riparian and aquatic habitats support biodiversity key environmental processes in semi-arid arid landscapes, but stressors such as conventional livestock grazing, wildfire, drought can degrade their condition. To enhance habitat for fish wildlife increase resiliency these critical areas, land managers the interior western United States increasingly use alternative grazing strategies, beaver management, or dam surrogates low-effort, low-expense restoration approaches. In this study we used...
Remote sensing has been pivotal to our understanding of freshwater fisheries, and we review this rapidly changing field with a focus on satellite airborne applications. Historical applications emphasized spatial variation in the environment (e.g., watershed land use situ primary productivity), but improved access imagery archives facilitates better change detection over time. New sensor platforms technology now yield higher spatial, temporal, spectral resolutions than ever before, which...
Conservation scientists have adapted conservation planning principles designed for protection of habitats ranging from terrestrial to freshwater ecosystems. We applied current approaches in prioritize California watersheds management biodiversity. For all watersheds, we compiled data on the presence/absence herpetofauna and fishes; observations freshwater-dependent mammals, selected invertebrates, plants; maps habitat types; measures condition vulnerability; status. analyzed...
Abstract Population viability analysis ( PVA ) uses concepts from theoretical ecology to provide a powerful tool for quantitative estimates of population dynamics and extinction risks. However, conventional statistical requires long‐term data every interest, whereas many species concern exist in multiple isolated populations that are only monitored occasionally. We present hierarchical multi‐population model increases inference power sparse by sharing information among assess risks while...
Abstract Improper riparian grazing can alter vegetation and reduce streambank stability, negatively impacting aquatic habitat biota. We evaluated differences in instream habitat, benthic macroinvertebrates, fish inside versus outside seven exclosures constructed from 1982 to 2005 Idaho. The normalized difference index Landsat imagery (1985 2015) showed significant increases productivity after some but not all were constructed. Field data collected 2015 woody be more abundant, streambanks...
Abstract Remote sensing products, including aerial imagery, can be used to quantify characteristics of watersheds and stream corridors that often predict the distribution abundance aquatic species. We conducted a supervised, object‐oriented classification imagery from National Agricultural Imagery Program develop high‐resolution (1‐m) land cover data set with four classes, emphasizing accurate characterization woody riparian vegetation along in northern Nevada southwestern Idaho. The overall...
Abstract The upper Colorado River basin contains one of the most imperiled fish faunas in North America. Anthropogenic land use and nonnative species impacts are considered among top reasons for imperilment. We determined association anthropogenic intensity (road density, percentage converted land, oil gas well density), relative abundance white suckers Catostomus commersonii their hybrids, natural landscape features with occurrences three native fishes basin, Wyoming, that have declined...
Population viability analysis (PVA) is a powerful conservation tool, but it remains impractical for many species, particularly species with multiple, broadly distributed populations which collecting suitable data can be challenging. A recently developed method of multiple-population (MPVA), however, addresses limitations traditional PVA. We built on previous development MPVA Lahontan cutthroat trout (LCT) (Oncorhynchus clarkii henshawi), listed under the U.S. Endangered Species Act, that...
Citizen-based stream monitoring programs have been conducted for decades by local citizens concerned about pollution of their streams and rivers. In recent years, public participation has increased dramatically as state federal agencies developed protocols citizen science condition water quality (Nerbonne Vondracek 2003; Newman et al. 2012). Furthering the trend dramatic increase in Internet access, web mapping capabilities that facilitate data storage display, technological improvements...
Post-breeding ecology of shrubland passerines prior to onset migration is unknown relative dynamics breeding areas. We radiomarked and monitored 38 Sage Sparrows (Amphispiza belli ssp. nevadensis) at one site in Oregon two Nevada from September mid-November 2007 track local movements, estimate seasonal range sizes, characterize weather patterns triggering migration. Median area used by between 3 18 days during or was 14 ha; maximum daily movement 15 km. Radio-marked each location departed...
The construction of logging roads has a major ecological impact on tropical forests and leads to large carbon emissions (Kleinschroth & Healy, 2017, Umunay et al. 2019). Negative impacts could potentially be drastically lowered with the adoption reduced-impact practices (Umunay Accurate, timely, dynamic road maps would help quantify prioritize opportunities for improved management forest conservation across globe. However, to-date, limited mapping required time-consuming field data...