scholarly journals Experimental evidence that predator range expansion modifies alpine stream community structure

2015 ◽  
Vol 34 (1) ◽  
pp. 66-80 ◽  
Author(s):  
K. Khamis ◽  
L. E. Brown ◽  
D. M. Hannah ◽  
A. M. Milner
Keyword(s):  
Community Structure ◽  
Experimental Evidence ◽  
Range Expansion ◽  
Stream Community ◽  
Alpine Stream

An Experimental Analysis of Biological Factors Contributing to Stream Community Structure

Ecology ◽  
1980 ◽  
Vol 61 (6) ◽  
pp. 1283-1290 ◽  
Author(s):  
Barbara L. Peckarsky ◽  
Stanley I. Dodson
Keyword(s):  
Community Structure ◽  
Experimental Analysis ◽  
Biological Factors ◽  
Stream Community

Macroinvertebrate Communities and Environment in a Southern African Mountain Stream

1988 ◽  
Vol 45 (12) ◽  
pp. 2168-2181 ◽  
Author(s):  
J. M. King ◽  
J. A. Day ◽  
P. R. Hurly ◽  
M-P. Henshall-Howard ◽  
B. R. Davies
Keyword(s):  
Community Structure ◽  
Environmental Variables ◽  
Mediterranean Ecosystems ◽  
Mountain Stream ◽  
Functional Feeding Groups ◽  
Stepwise Discriminant Analysis ◽  
Macroinvertebrate Communities ◽  
Strong Correlations ◽  
Stream Community ◽  
Community Changes

In a study of a second-order southern African stream, complementary classification and multidimensional scaling (MDS) techniques revealed longitudinal changes in macroinvertebrate community structure, but no temporal changes. Stepwise discriminant analysis and multiple linear regression were used to identify environmental variables correlated with the community changes but produced conflicting results depending on the information used, possibly because of strong correlations between some of the variables. The MDS plot of biotic samples illustrated that potassium levels correlated most strongly with community distribution. Because of the large number of variables now shown worldwide to correlate with faunal distributions, we suggest ways to choose the variables to suit the kind of study to be undertaken. Attempts to assign the invertebrates to functional feeding groups (FFGs) were unsatisfactory as the relevant categories are poorly defined and often inadequate for classifying the fauna. We suggest that until these categories are more clearly defined, and more uniformly applied, concepts relating to FFGs cannot be tested satisfactorily. The stream community in Langrivier is more similar to communities found in two other mediterranean ecosystems than to those in other southern African rivers, probably because of the greater predictability of flow in the former.

Microbial Diversity and Community Structure in Alpine Stream Soil

2020 ◽  
pp. 1-10
Author(s):  
Atta Rasool ◽  
Salar Ali ◽  
Waqar Ali ◽  
Gaber E. Eldesoky ◽  
Muhammad Shafeeque ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Diversity ◽  
Alpine Stream

Trophic trickles and cascades in a complex food web: impacts of a keystone predator on stream community structure and ecosystem processes

Oikos ◽  
2008 ◽  
Vol 117 (5) ◽  
pp. 683-692 ◽  
Author(s):  
Guy Woodward ◽  
Georgia Papantoniou ◽  
François Edwards ◽  
Rasmus B. Lauridsen
Keyword(s):  
Community Structure ◽  
Food Web ◽  
Ecosystem Processes ◽  
Keystone Predator ◽  
Stream Community

scholarly journals Effects of Changing Vegetation Composition on Community Structure, Ecosystem Functioning, and Predator–Prey Interactions at the Saltmarsh-Mangrove Ecotone

Diversity ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 208 ◽  
Author(s):  
Julie E. Walker ◽  
Christine Angelini ◽  
Ilgar Safak ◽  
Andrew H. Altieri ◽  
Todd Z. Osborne
Keyword(s):  
Community Structure ◽  
Range Expansion ◽  
Ecosystem Functioning ◽  
Structural Complexity ◽  
Ecosystem Functions ◽  
Vegetation Composition ◽  
Algal Communities ◽  
Predator Prey ◽  
Vegetation Height ◽  
Structural Metrics

Decreasing frequency of freeze events due to climate change is enabling the poleward range expansion of mangroves. As these tropical trees expand poleward, they are replacing herbaceous saltmarsh vegetation. Mangroves and saltmarsh vegetation are ecosystem engineers that are typically viewed as having similar ecosystem functions. However, few studies have investigated whether predation regimes, community structure, and ecosystem functions are shifting at the saltmarsh-mangrove ecotone. In this study, we manipulated predator access to marsh and mangrove creekside habitats to test their role in mediating vegetation and invertebrate structure and stability in a two-year experiment. We also conducted a survey to evaluate how shifting vegetation is modifying structural complexity, invertebrate communities, and ecosystem functioning at the ecotone. Excluding larger (> 2 cm diameter) predators did not affect vegetation or invertebrate structure or stability in either saltmarsh or mangrove habitats. The survey revealed that the two habitat types consistently differ in structural metrics, including vegetation height, inter-stem distance, and density, yet they support similar invertebrate and algal communities, soil properties, and predation rates. We conclude that although mangrove range expansion immediately modifies habitat structural properties, it is not altering larger predator consumptive effects, community stability, community composition, or some other ecosystem functions and properties at the ecotone.

scholarly journals Effects of land cover type on community structure and functional traits of alpine stream benthic macroinvertebrates

2019 ◽  
Vol 65 (3) ◽  
pp. 524-539 ◽  
Author(s):  
Alberto Scotti ◽  
Leopold Füreder ◽  
Thomas Marsoner ◽  
Ulrike Tappeiner ◽  
Agnieszka E. Stawinoga ◽  
...  
Keyword(s):  
Community Structure ◽  
Land Cover ◽  
Functional Traits ◽  
Benthic Macroinvertebrates ◽  
Land Cover Type ◽  
Cover Type ◽  
Alpine Stream
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