A5069257853- Fish Ecology and Management Studies
- Fish biology, ecology, and behavior
- Isotope Analysis in Ecology
- Fish Biology and Ecology Studies
- Marine and fisheries research
- Marine Bivalve and Aquaculture Studies
- Freshwater macroinvertebrate diversity and ecology
- Aquatic Ecosystems and Biodiversity
- Hydrology and Sediment Transport Processes
- Mercury impact and mitigation studies
- Marine animal studies overview
- Coastal wetland ecosystem dynamics
- Atmospheric and Environmental Gas Dynamics
- Scientific Computing and Data Management
- Genetic diversity and population structure
- Hydrology and Watershed Management Studies
- Marine and coastal ecosystems
- Hydropower, Displacement, Environmental Impact
- Aquatic Invertebrate Ecology and Behavior
- Soil and Water Nutrient Dynamics
- Environmental Toxicology and Ecotoxicology
- Geology and Paleoclimatology Research
- Water-Energy-Food Nexus Studies
- American Environmental and Regional History
- Conservation, Biodiversity, and Resource Management
University of North Texas
2015-2024
Hudson Institute
2018
John Wiley & Sons (United States)
2018
Texas A&M University
2003-2010
Universidade Estadual de Mato Grosso do Sul
2009
Universidade Federal do Tocantins
2009
Kansas State University
2006-2008
Mitchell Institute
2007
Basin-scale planning is needed to minimize impacts in mega-diverse rivers
Abstract Aim To examine the roles of local and regional environmental variables biotic interactions in determining structure stream fish assemblages, to compare results derived from analyses based on taxonomic functional groups. Location Texas, USA. Methods Species abundance data were compiled for 157 assemblages several river basins across Texas. condensed into groups trophic life‐history characteristics. Local either measured at each location or determined scale maps public‐access bases....
We reviewed concepts of patch dynamics and environmental heterogeneity their applications to the study fluvial ecosystems, with emphasis on research published in J-NABS. discuss several important papers synthesizing theories findings this topic reports descriptive experimental research. A large body research, much it J-NABS, has demonstrated how spatial temporal variation influences population, community, ecosystem patterns processes ecosystems. Conceptual models can be traced 2 basic...
Applying the ecosystem services concept to conservation initiatives or in managing requires understanding how environmental impacts affect ecology of key species functional groups providing services. We examined effects river impoundments, one leading threats freshwater biodiversity, on an important service provided by large tropical rivers (i.e., artisanal fisheries). The societal and economic importance this developing countries may provide leverage advance agendas where future...
Abstract Deforestation is a primary driver of biodiversity change through habitat loss and fragmentation. Stream may not respond to deforestation in simple linear relationship. Rather, threshold responses extent timing occur. Identification critical thresholds needed for effective conservation management. We tested fish species functional groups degree watershed riparian zone time since impact 75 streams the western Brazilian Amazon. used remote sensing assess from 1984 2011. Fish...
Food‐chain length is a central characteristic of ecological communities that affects community structure and ecosystem function. What determines the food chains not well resolved for most ecosystems. Herein, we examine environmental correlates food‐chain based on productivity hypothesis, compare lengths among aquatic types identify bi‐directional effects river impoundment in Paraná River Basin South America. Both temperature regime, surrogate productivity, type significantly affected...
Abstract The Amazon rainforest has experienced rapid land‐use changes over the last few decades, including extensive deforestation that can affect riparian habitats and streams. aim of this study was to assess responses stream fish assemblages land cover change in eastern Amazon. We expected percentage forest catchment is correlated with local habitat complexity, which turn determines assemblage composition structure. sampled 71 streams areas different uses tested for relationships between...
Here we extend a discussion initiated by Toussaint et al. (Sci Rep 6:22125, 2016) concerning the relationship between global patterns of freshwater fish functional diversity (FD) and its vulnerability to human impacts. Based on set morphological traits, they concluded that Neotropical fishes have highest FD, but low given high levels redundancy. This conclusion implies conservation efforts for should emphasize temperate regions. perspective is risky, because al.'s study seriously...
Abstract Ecosystem processes and biological community structure are expected to change in a relatively predictable manner along fluvial gradients within river basins. Such predictions heavily based on temperate rivers, food web variation Mesoamerican rivers has received limited attention. In this study, we analyzed carbon nitrogen stable isotope ratios of basal sources dominant consumer species examine aquatic the gradient Monkey River Basin, Belize. Similar previous studies other regions,...
Mangrove and seagrass habitats are important components of tropical coastal zones worldwide, conspicuous Centla Wetland Biosphere Reserve (CWBR) in Tabasco, Mexico. In this study, we examine food webs mangrove- seagrass-dominated CWBR using stable isotope ratios carbon nitrogen. Our objective was to identify the importance derived from mangroves seagrasses secondary production aquatic consumers poorly studied conservation area. Carbon nitrogen basal sources indicated that species-rich both...
Experiments with realistic scenarios of species loss from multitrophic ecosystems may improve insight into how biodiversity affects ecosystem functioning. Using 1000 L mesocoms, we examined effects nonrandom on community structure and functioning experimental food webs based tropical floodplain lagoon ecosystems. Realistic were developed long-term field surveys, assemblages replicated sequential rare which occurred across all trophic levels these complex webs. Response variables represented...
Abstract To advance current environmental flow standards in Texas, we developed field, laboratory, and analytical methods to model recruitment dynamics of indicator species selected cover a range population responses variation. Preliminary investigations were conducted three central Texas river basins evaluate the feasibility these for formulating evaluating state's standards. Age analysis allowed back-calculation dates fish hatching, mussel recruitment, tree germination estimation temporal...
The Xingu River, located in northern Brazil, is already under the impacts of one most harmful projects history Amazon – Belo Monte hydroelectric dam. A new megaproject called 'Volta Grande Project', led by Canadian gold mining company Sun will be situated adjacent to same stretch that dewatered complex. Various aspects project are controversial. There reports acquired public lands illegally, affected area has high biodiversity and endemism several taxonomic groups, operations would...
Abstract – In this study we examine trends in body condition of three Cichla species native to the Cinaruco River, Venezuela. Specifically, characterise potential subsidy provided by migratory Semaprochilodus kneri comparing among species, hydrologic seasons and different size‐classes (based on ability consume S. assuming gape‐limitation). All had lowest during rising‐water season (following reproduction period). Only temensis greater falling‐water than low‐water season. During season, C....
Abstract One of the main causes biodiversity loss in aquatic ecosystems is instream habitat change associated with land‐use drainage basin. Biofuel crop production an increasingly important driver existing agricultural basins. Conceptually, biofuels such as sugarcane ( Saccharum spp.: Poaceea) can provide a sustainable alternative to fossil fuels, but little known about consequences biofuel for biodiversity. Thus, our aim was investigate if and how degree further environmental changes at...