A5060392671- Freshwater macroinvertebrate diversity and ecology
- Fish Ecology and Management Studies
- Environmental DNA in Biodiversity Studies
- Species Distribution and Climate Change
- Cryospheric studies and observations
- Hydrology and Sediment Transport Processes
- Aquatic Invertebrate Ecology and Behavior
- Genetic diversity and population structure
- Physiological and biochemical adaptations
- Climate change and permafrost
- Wildlife-Road Interactions and Conservation
- Smart Materials for Construction
- Soil and Water Nutrient Dynamics
- Diptera species taxonomy and behavior
- Fire effects on ecosystems
- Isotope Analysis in Ecology
- Hemiptera Insect Studies
- Rangeland and Wildlife Management
- Forest Ecology and Biodiversity Studies
- Hydrology and Watershed Management Studies
- Ecology and biodiversity studies
- Genetic and phenotypic traits in livestock
- Water Quality and Resources Studies
- Identification and Quantification in Food
- Microbial Community Ecology and Physiology
Missouri State University
2016-2024
Oregon State University
2007-2017
University of Cuenca
2015-2017
University of Birmingham
2012-2014
Colorado State University
2004-2011
Griffith University
2011
Swiss Federal Institute of Aquatic Science and Technology
2009
Google (United States)
2007
The use of species traits to characterize the functional composition benthic invertebrate communities has become well established in ecological literature. This approach holds much potential for predicting changes both and assemblages along environmental gradients terms that are sensitive local conditions. Further, burgeoning field biomonitoring, a provides predictive basis understanding community-level responses alteration caused by humans. Despite progress recent years, full traits-based...
Abstract River networks are hierarchical dendritic habitats embedded within the terrestrial landscape, with varying connectivity between sites depending on their positions along network. This physical organisation influences dispersal of organisms, which ultimately affects metacommunity dynamics and biodiversity patterns. We provide a conceptual synthesis role river in structuring metacommunities relation to processes riverine ecosystems. explore where network best explains observed...
Today, decisions regarding the management and conservation of populations are often informed to some degree by population genetics.A fundamental measure sought decisionmakers is connectivity between populations, which, when approached from a genetic perspective, may be influenced many factors, making it difficult generalize across taxa, habitats, or life histories.In case freshwaterlimited fauna, shared constraint habitat structure (e.g., dendritic stream network) imposed on all species in...
Headwaters (stream orders 1–2) traditionally have been considered depauperate compared to mid-order streams (orders 3–4)—a conclusion that arises from a perception of as linear systems and emphasizes change in average α (local) diversity along streams. We hypothesized an opposite pattern for β (among-site) suggest headwaters might account large degree basin-scale biodiversity if within the more realistic framework branching networks. assembled pre-existing data across globe test this...
Abstract Mountains are global biodiversity hotspots where cold environments and their associated ecological communities threatened by climate warming. Considerable research attention has been devoted to understanding the effects of alpine glacier snowfield recession. However, much less given identifying refugia in mountain ecosystems present‐day environmental conditions will be maintained, at least near‐term, as other habitats change. Around world, montane microbes, animals, plants live on,...
Using the mitochondrial cytochrome oxidase I (COI) gene, we assessed phylogeographic structure of Prosimulium neomacropyga, a black fly (Simuliidae) whose distribution in US Southern Rockies ecoregion is limited to alpine tundra streams. Given high habitat specificity, lack hydrological connection between streams, and terrestrial environment restrictive insect flight, hypothesized gene flow. A spatially nested sampling design showed that grouping populations according high-elevation...
Summary 1. High‐gradient mountain streams are ideal for studying longitudinal biological patterns, although the degree of similarity in gradient among physically similar a region is poorly known. Our first objective was to evaluate variability benthic communities along four central Rocky Mountains Colorado. We analysed relative influence position versus reach‐scale physical variables on community structure and measured at comparable positions streams. 2. second utility taxonomically...
Summary 1. The spatial distribution of stream‐dwelling organisms is often considered to be limited primarily according the hierarchical structure hydrologic network, and previous conceptual models population genetic have reflected this generality. Headwater specialists, however, are confined short upstream sections therefore unlikely respond in same way as species with a broader range habitat tolerance. 2. Here, we propose model describe patterns diversity headwater specialists ability for...
ABSTRACT Aim Small (< 1 km 2 ) alpine glaciers are likely to disappear in this century, resulting decreased regional habitat heterogeneity associated streams. Both within and spatial isolation among glacier‐influenced streams can enhance beta diversity of stream‐dwelling organisms. We measured at both community population‐genetic levels currently influenced by small Pyrenean glaciers. aimed evaluate whether patterns analogous between the two levels, apply various approaches for...
Abstract Alpine streams are dynamic habitats harboring substantial biodiversity across small spatial extents. The diversity of alpine stream biota is largely reflective environmental heterogeneity stemming from varying hydrological sources. Globally, under threat as meltwater sources recede and conditions become increasingly homogeneous. Much attention has been devoted to macroinvertebrate in headwaters, yet fully understand the breadth climate change threats, a more thorough accounting...
Abstract In mountains, environmental gradients are steep in both terrestrial and aquatic systems, climate change is causing upward shifts of physical biological features these gradients. Glacial streams an interesting system to evaluate such because have a linear nature (for simplicity analysis), the stream habitat will at least temporarily lengthen as it follows receding glaciers upward. The Tschierva Glacier, Swiss Alps, receded 482 m upstream from 1997 2008. We tested null hypothesis that...
Natural disturbance regimes—cycles of fire, flood, drought or other events—range from highly predictable (disturbances occur regularly in time concert with a proximate cue) to unpredictable. While theory predicts how populations should evolve under different degrees predictability, there is little empirical evidence this occurs nature. Here, we demonstrate local adaptation an aquatic insect occupying sites along natural gradient where predictability was defined as the ability cue (rainfall)...
Dams are known to impact river channels and ecosystems, both during their lifetime in decommissioning. In this study, we applied a before-after-control-impact design associated with two small dam removals investigate abiotic biotic recovery trajectories from the elimination of press disturbance presence dams introduction pulse removal dams. The case studies represent different geomorphic ecological conditions that expected low high sensitivities removal: 4 m tall, gravel-filled Brownsville...
Summary Molecular genetic techniques have been used in freshwater biology for more than 30 years. Early work focussed on studies of population structure, systematics and taxonomy. More recently, the range has broadened to include ecology adaptation. Advances analytical methods technology (e.g. next‐generation sequencing) decreasing costs data production ensure that field will continue develop broaden scope. At least three factors make application molecular exciting. First, highly variable...
Summary Glaciers that directly feed high‐altitude streams create unique environmental conditions contribute substantially to regional‐scale lotic habitat diversity and biodiversity, including intra‐specific genetic (as population structure) between glacier‐fed other types of (e.g. groundwater‐fed). However, these population‐genetic patterns are thus far only understood for macroinvertebrates in the temperate zone, where strong seasonality narrow temporal windows emergence mating could help...
Given the unique spatial structure of stream habitat and stochasticity characteristic lotic ecosystems, metacommunity approaches hold much promise in field ecology. We take advantage tight parallels between neutral theories molecular evolution community assembly present a novel conceptual approach to evaluating role dispersal limitation structuring metacommunities. The analogous frameworks generate similar expectations for species comprising communities genes populations, particularly among...
Summary 1. Using a portion of the mitochondrial cytochrome oxidase I gene, we evaluated population genetic structure geographically rare black fly ( Metacnephia coloradensis ) that is habitat specialist in outlet streams large, productive, alpine lakes Colorado, U.S.A. Given its rarity and life history traits restrict dispersal, hypothesised would show signature allopatric fragmentation associated with climatic warming since Pleistocene glaciations. 2. We tested for isolation by distance...
Flight of alpine stream insects has not been well studied but is an important ecological process that ensures successful mating and allows gene flow among relatively isolated populations. In this study, we collected actively flying along a perpendicular transect from headwater in the Colorado Rocky Mountains (U.S.A.) during summer emergence season two consecutive years with contrasting hydrology: 2002 had minimal snowfall previous winter, while 2003 was above average. activity patterns four...
Climate change will cause relict alpine glaciers to disappear within decades. Associated high-altitude streams face significant hydrological changes that might affect population genetic diversity of lotic species. In a recent study glacier-fed in the Pyrenees, Finn et al. (2013) predicted large proportion regional mayfly Baetis alpinus would be lost as glacial meltwater sources disappear. We expanded analysis include data (mitochondrial barcoding region) collected from B. occupying recently...
Abstract Aim Climate change is broadly affecting phenology, but species‐specific phenological response to temperature not well understood. In streams, insect emergence has important ecosystem‐level consequences because emergent adults link aquatic and terrestrial food webs. We quantified timing duration (within‐population synchronicity) of insects among streams along a spatiotemporal gradient mean water in montane basin assess the sensitivity these traits heat accumulation from mid‐winter...
The Odonata are not typically regarded as informative taxa for stream bioassessment in North America compared to other insects, particularly when monitoring the ecological impacts of organic pollution. However, we hypothesized that stream-dwelling odonates useful bioindicators riparian conditions because vegetation associated with streams is used oviposition and establishing breeding territories likely a cue suitable nymphal habitat. We sampled from multiple microhabitats all...