2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/22/2018 | 3:00 PM - 3:15 PM | THE ROLE OF FOREST REMNANTS IN MAINTAINING STREAM ECOSYSTEM INTEGRITY: THE PENETRANCE EFFECT. | 410 B
THE ROLE OF FOREST REMNANTS IN MAINTAINING STREAM ECOSYSTEM INTEGRITY: THE PENETRANCE EFFECT.
Riparian corridors in contemporary landscapes are characterized by a mosaic of vegetation patches resulting from a variety of human activities. Forest fragmentation is known to cause edge responses that are key to understanding the influence of landscape structure on habitat quality. Since streams are transport-dominated ecosystems, it is unlikely that changes in instream conditions map synchronously with the spatial pattern of riparian fragmentation. Local riparian influences are likely to be propagated some distance downstream, creating a downstream 'shadow' of upstream riparian conditions. Here we present a method to estimate these penetrance effects on a suite of environmental variables and invertebrate communities from 4 sampled transitions (2 in SE Brazil, 2 in Colorado, USA). We employed a threshold modelling approach based on alternative nonlinear models. Inverse estimation was applied to determine the distance in which the variables started to shift from upstream stable conditions and how far the buffering effects of the upstream riparian condition could be detected. We find that the method is suited for detecting downstream effects of riparian vegetation, and evidence riparian vegetation potential on both restoring upstream degraded conditions and maintaining downstream conditions through abrupt riparian discontinuities.
- Landuse
- Riparian
- Spatial
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Presenters/Authors
Rafael Feijó de Lima
(), University of Montana, rafael.feijo@mso.umt.edu;
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Steven Thomas
(), School of Natural Resources, University of Nebraska-Lincoln, Lincoln, sthomas5@unl.edu;
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Eduardo F. Silva-Júnior
(), Universidade do Estado do Rio de Janeiro, eduardobioadventure@gmail.com ;
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Leonardo Kleba Lisboa
(), Universidade do Estado do Rio de Janeiro, leokleba@yahoo.com.br;
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Timothy P. Moulton
(), Universidade do Estado do Rio de Janeiro, moulton.timothy@gmail.com;
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Scott Mcleay
(), University of Alabama, smcleay27@gmail.com;
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Eugenia Zandona
(), Universidade do Estado do Rio de Janeiro, eugenia.zandona@gmail.com;
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