14 documents found, page 1 of 2
Experimental forest fragmentation alters Amazonian mixed-species flocks
Rutt, Cameron L.; Mokross, Karl [UNESP]; Kaller, Michael D.; Stouffer, Philip C.Made available in DSpace on 2020-12-10T19:51:33Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-02-01; US National Science Foundation; National Geographic Society; National Institute of Food and Agriculture, US Department of Agriculture, McIntire Stennis projects; Habitat fragmentation has been associated with myriad negative effects for forest-dependent birds in the Neotropics. However, the vast majorit...
Decay of interspecific avian flock networks along a disturbance gradient in Ama...
Mokross, Karl S.; Ryder, Thomas Brandt; Côrtes, Marina Corrêa; Wolfe, Jared D.; Stouffer, Philip C.Our understanding of how anthropogenic habitat change shapes species interactions is in its infancy. This is in large part because analytical approaches such as network theory have only recently been applied to characterize complex community dynamics. Network models are a powerful tool for quantifying how ecological interactions are affected by habitat modification because they provide metrics that quantify com...
BIOFRAG - a new database for analyzing BIOdiversity responses to forest FRAGmen...
Pfeifer, Marion; Lefebvre, Véronique; Gardner, Toby Alan; Arroyo-Rodríguez, Víctor; Baeten, Lander; Banks-Leite, Cristina; Barlow, JosHabitat fragmentation studies have produced complex results that are challenging to synthesize. Inconsistencies among studies may result from variation in the choice of landscape metrics and response variables, which is often compounded by a lack of key statistical or methodological information. Collating primary datasets on biodiversity responses to fragmentation in a consistent and flexible database permits s...
Effects of a regenerating matrix on the survival of birds in tropical forest fr...
Wolfe, Jared D.; Stouffer, Philip C.; Bierregaard, Richard O.; Luther, David Andrew; Lovejoy, Thomas E.Background: Vast areas of lowland neotropical forest have regenerated after initially being cleared for agricultural purposes. The ecological value of regenerating second growth to forest-dwelling birds may largely depend on the age of the forest, associated vegetative structure, and when it is capable of sustaining avian demographics similar to those found in pristine forest. Methods: To determine the influenc...
Matrix and area effects on the nutritional condition of understory birds in Ama...
Hernández-Palma, Angélica; Stouffer, Philip C.Forest fragmentation, a result of deforestation, not only decreases the amount of habitat available for wildlife, but also increases the isolation of the remaining fragments and the area of edges surrounding them. Also, deforestation often leads to the creation of a dynamic regenerating matrix where cleared land is subsequently abandoned. Here we examine the effects of fragmentation and landscape change on the ...
Step selection techniques uncover the environmental predictors of space use pat...
Potts, Jonathan R.; Mokross, Karl S.; Stouffer, Philip C.; Lewis, Mark AlunUnderstanding the behavioral decisions behind animal movement and space use patterns is a key challenge for behavioral ecology. Tools to quantify these patterns from movement and animal-habitat interactions are vital for transforming ecology into a predictive science. This is particularly important in environments undergoing rapid anthropogenic changes, such as the Amazon rainforest, where animals face novel la...
Understory bird communities in Amazonian rainforest fragments: Species turnover...
Stouffer, Philip C.; Johnson, Erik I.; Bierregaard, Richard O.; Lovejoy, Thomas E.Inferences about species loss following habitat conversion are typically drawn from short-term surveys, which cannot reconstruct long-term temporal dynamics of extinction and colonization. A long-term view can be critical, however, to determine the stability of communities within fragments. Likewise, landscape dynamics must be considered, as second growth structure and overall forest cover contribute to process...
Rates of species loss from Amazonian forest fragments
Ferraz, Gonçalo; Russell, Gareth J.; Stouffer, Philip C.; Bierregaard, Richard O.; Pimm, Stuart; Lovejoy, Thomas E.In the face of worldwide habitat fragmentation, managers need to devise a time frame for action. We ask how fast do understory bird species disappear from experimentally isolated plots in the Biological Dynamics of Forest Fragments Project, central Amazon, Brazil. Our data consist of mist-net records obtained over a period of 13 years in 11 sites of 1, 10, and 100 hectares. The numbers of captures per species p...
Island vs. countryside biogeography: An examination of how Amazonian birds resp...
Wolfe, Jared D.; Stouffer, Philip C.; Mokross, Karl S.; Powell, Luke L.; Anciães, MarinaAvian diversity in fragmented Amazonian landscapes depends on a balance between extinction and colonization in cleared and disturbed areas. Regenerating forest facilitates bird dispersal within degraded Amazonian landscapes and may tip the balance in favor of persistence in habitat patches. Determining the response of Amazonian birds to fragmentation may be hindered because many species use adjacent second grow...
Experimental translocations: Pitfalls and alternatives for quantifying animal m...
Powell, Luke L.; Stouffer, Philip C.As anthropogenic change continues to fragment terrestrial habitats, conservation biologists are increasingly concerned with how wild animals move through fragmented landscapes. Experimental translocations have recently gained popularity as a technique to determine landscape permeability by wild animals in fragmented landscapes. In experimental translocations, researchers capture individuals — usually adults — a...