Ring-based versus disc-based separation of spatial scales: a case study on the impact of arable land proportions on invertebrates in freshwater streams
(2011) In Aquatic Ecology 45(3). p.351-356- Abstract
- The impact of different land-use types on
species is traditionally estimated by correlating
landscape proportions recorded in buffer areas around
focal points with species data observed at these sites.
If a high proportion of a specific land-use type exists
within a small radius, it will be accumulated in larger
buffers and may confound the interpretation at larger
scales. We sampled freshwater invertebrates in ten
streams using cages with artificial substrate and
compared the effects of arable land proportions
calculated in disc-shaped buffers of increasing radius
versus areas calculated from non-overlapping rings of
increasing... (More) - The impact of different land-use types on
species is traditionally estimated by correlating
landscape proportions recorded in buffer areas around
focal points with species data observed at these sites.
If a high proportion of a specific land-use type exists
within a small radius, it will be accumulated in larger
buffers and may confound the interpretation at larger
scales. We sampled freshwater invertebrates in ten
streams using cages with artificial substrate and
compared the effects of arable land proportions
calculated in disc-shaped buffers of increasing radius
versus areas calculated from non-overlapping rings of
increasing radius. We hypothesize that (1) the
accumulative disc-based approach leads to confounding
effects across increasing buffer size and that (2)
the use of ring-based methods facilitates the identification
of relevant scales for conservation measures.
The abundance of crustaceans showed a positive
relationship with arable land proportions, but Plecoptera
abundance and the taxonomic richness of
Ephemeroptera and Plecoptera decreased with
increasing arable land proportions in the surrounding
landscape. Our results further support the presence of
confounding effects in disc-based analyses, as correlations
between arable land proportions and Crustacea,
or Plecoptera, respectively, were affected by the
accumulation of small-scale area proportions. The
distance at which arable land proportions significantly
affected benthic fauna in freshwater streams
was consistently shorter if calculated from rings
rather than from discs. Although an a priori definition
of ring width introduces new challenges, a combined
use of disc- and ring-based techniques for the
estimation of land-use effects may substantially
improve the realization of conservation and protection
measures in terrestrial and aquatic systems. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2440397
- author
- Schneider, Christine ; Ekschmitt, Klemens ; Wolters, Volkmar and Birkhofer, Klaus LU
- organization
- publishing date
- 2011
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Arthropod diversity, Crustacea, EPT taxa, Landscape analysis, Land-use type, Multi-scale analysis, Spatial analysis, Spatial memory
- in
- Aquatic Ecology
- volume
- 45
- issue
- 3
- pages
- 351 - 356
- publisher
- Springer
- external identifiers
-
- scopus:79960734154
- ISSN
- 1386-2588
- DOI
- 10.1007/s10452-011-9358-8
- language
- English
- LU publication?
- yes
- id
- 46680791-4378-4cc9-a46c-a7c512563643 (old id 2440397)
- alternative location
- http://www.scopus.com/inward/record.url?eid=2-s2.0-79960734154&partnerID=40&md5=6ac789daca45cbf91ddbecda8ea279ae
- date added to LUP
- 2016-04-01 10:11:14
- date last changed
- 2022-01-25 20:37:05
@article{46680791-4378-4cc9-a46c-a7c512563643,
abstract = {{The impact of different land-use types on<br/><br>
species is traditionally estimated by correlating<br/><br>
landscape proportions recorded in buffer areas around<br/><br>
focal points with species data observed at these sites.<br/><br>
If a high proportion of a specific land-use type exists<br/><br>
within a small radius, it will be accumulated in larger<br/><br>
buffers and may confound the interpretation at larger<br/><br>
scales. We sampled freshwater invertebrates in ten<br/><br>
streams using cages with artificial substrate and<br/><br>
compared the effects of arable land proportions<br/><br>
calculated in disc-shaped buffers of increasing radius<br/><br>
versus areas calculated from non-overlapping rings of<br/><br>
increasing radius. We hypothesize that (1) the<br/><br>
accumulative disc-based approach leads to confounding<br/><br>
effects across increasing buffer size and that (2)<br/><br>
the use of ring-based methods facilitates the identification<br/><br>
of relevant scales for conservation measures.<br/><br>
The abundance of crustaceans showed a positive<br/><br>
relationship with arable land proportions, but Plecoptera<br/><br>
abundance and the taxonomic richness of<br/><br>
Ephemeroptera and Plecoptera decreased with<br/><br>
increasing arable land proportions in the surrounding<br/><br>
landscape. Our results further support the presence of<br/><br>
confounding effects in disc-based analyses, as correlations<br/><br>
between arable land proportions and Crustacea,<br/><br>
or Plecoptera, respectively, were affected by the<br/><br>
accumulation of small-scale area proportions. The<br/><br>
distance at which arable land proportions significantly<br/><br>
affected benthic fauna in freshwater streams<br/><br>
was consistently shorter if calculated from rings<br/><br>
rather than from discs. Although an a priori definition<br/><br>
of ring width introduces new challenges, a combined<br/><br>
use of disc- and ring-based techniques for the<br/><br>
estimation of land-use effects may substantially<br/><br>
improve the realization of conservation and protection<br/><br>
measures in terrestrial and aquatic systems.}},
author = {{Schneider, Christine and Ekschmitt, Klemens and Wolters, Volkmar and Birkhofer, Klaus}},
issn = {{1386-2588}},
keywords = {{Arthropod diversity; Crustacea; EPT taxa; Landscape analysis; Land-use type; Multi-scale analysis; Spatial analysis; Spatial memory}},
language = {{eng}},
number = {{3}},
pages = {{351--356}},
publisher = {{Springer}},
series = {{Aquatic Ecology}},
title = {{Ring-based versus disc-based separation of spatial scales: a case study on the impact of arable land proportions on invertebrates in freshwater streams}},
url = {{http://dx.doi.org/10.1007/s10452-011-9358-8}},
doi = {{10.1007/s10452-011-9358-8}},
volume = {{45}},
year = {{2011}},
}