Navigation Links
Networks of small habitat patches can preserve urban biodiversity
Date:11/13/2008

Sets of small and seemingly insignificant habitat patches that are within reach for mobile species may under certain circumstances, as a group, provide an acceptable alternative to larger and contiguous habitats. This finding can make preservation of important ecological functions possible even in urban and other heavily exploited areas.

The study by Dr. Erik Andersson and Dr. rjan Bodin at the Department of Systems Ecology, and Stockholm Resilience Centre, both at Stockholm University, is unique in the sense that they empirically test and verify an often used modelling approach where habitat fragments are seen as individual nodes in larger networks of interconnected habitat patches.

According to the study, published yesterday in Ecography, sets of small habitat patches can host species that require much larger habitat patches for their daily needs than what each patch itself can provide. Many species are actually capable of moving back and forth between neighbouring patches, given that they are not perceived as being too far apart. Thus, many species are able to make use of the total of the habitat fragments in the network instead of relying on the individual habitat patches for their persistence.

"By defining the habitat patches as parts of a larger network, spatially explicit analyses of how the sum of the patches contributes to species dynamics on the level of landscapes are possible" said Dr. Andersson.

In human dominated areas, such as cities or intensively cultivated landscapes, it is often impossible to set aside large contiguous areas of natural vegetation. Instead, when multiple users compete for a limited area of land, only smaller pockets of natural vegetation (or just green areas) can realistically be preserved.

"Land managers need comprehensive and reliable tools that could help them to direct their conservation efforts to habitat patches where they get as much biodiversity as possible given a limited budget. Our study empirically shows that the network modeling approach is a good candidate for developing such a tool" said Dr. Bodin.

The study combines empirical field studies of birds with theoretical and statistical modelling. A range of bird species were surveyed in various green areas of different size and type in the urban area of Stockholm, Sweden. Geographical Information System (GIS) techniques were deployed to model the urban landscape as a network of individual habitat fragments. The field data were then used to test and verify the assumptions behind the network model.

Modelling a landscape as a network provides for many new analytical possibilities. However, the network modelling approach as such has, until now, rarely been tested empirically.

"Our study gives strength to the network perspective of landscapes, and thus supports further development of new and exiting network-based analyses that could help managers to preserve valuable ecological functions even in very fragmented landscapes" said Dr. Andersson.

The study also showed that it is important to differentiate between different types of green areas when constructing a habitat network since many species have quite different habitat preferences. In addition, the effect of movement barriers and the existence of stepping stones should be included in the analysis, a fact which is particularly relevant in urban areas.


'/>"/>

Contact: Ellika Hermansson Trk
ellika@stockholmresilience.su.se
468-674-7744
Wiley-Blackwell
Source:Eurekalert

Related biology news :

1. IdentiPHI Re Launches SAFmodule Software to Secure Novell(R) Networks
2. IdentiPHI Re Launches SAFmodule Software to Secure Novell(R) Networks
3. Alternative food networks connect ethical producers and consumers and can lead to healthier eating
4. Solidus Networks, Inc. Seats New Board of Directors
5. Gene Networks in Animal Development and Evolution Feb. 15 and 16
6. Nature paper describes technique for extracting hierarchical structure of networks
7. Rainfall and river networks prove accurate predictors of fish biodiversity
8. Using networks to map the social lives of animals
9. New evidence on the robustness of metabolic networks
10. CSHL team traces extensive networks regulating alternative RNA splicing
11. GEN reports on novel tools for deciphering biological networks
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/26/2020)... ... 2020 , ... Modality Solutions, a biopharmaceutical cold chain validation engineering ... The list is the most prestigious ranking of the nation’s fastest-growing private companies. Modality ... list, reported three-year revenue growth of 71 percent. , The Inc. 5000 list ...
(Date:8/21/2020)... (PRWEB) , ... August 20, 2020 , ... ... that Hassan Movahhed , a Clinical Operations executive with expertise in clinical ... has joined the firm as an Expert Consultant. Throughout his career, Mr. Movahhed ...
(Date:8/5/2020)... Fla. (PRWEB) , ... August 05, 2020 , ... Regenative ... cover two new innovations, CoreText™ and ProText™, making them the first Wharton’s jelly allografts ... defect using a syringe. The company’s solutions are the first Wharton’s jelly allograft product ...
Breaking Biology News(10 mins):
(Date:7/10/2020)... ... July 09, 2020 , ... ... Institute of Technology (MIT) has expanded the company’s exclusive license to include ... into the point-of-care diagnostic market, focusing initially on the SARS-CoV-2 biosensor. ...
(Date:7/10/2020)... ... July 09, 2020 , ... Sentien Biotechnologies, ... the hiring of Allen R. Nissenson, M.D., F.A.C.P., as its Chief Medical Officer. ... of Sentien’s lead product, SBI-101. Dr. Nissenson serves as an Emeritus Professor ...
(Date:7/7/2020)... ... July 06, 2020 , ... Bio-IT World has announced the ... Squibb, the University of Chicago, Massachusetts General Hospital, Mission: Cure, and the Pistoia ... program, highlighting outstanding examples of how technology innovations and strategic initiatives can be ...
(Date:7/1/2020)... ... June 29, 2020 , ... The Interlocal Purchasing ... to its membership, recently named BioFit Engineered Products an Awarded Vendor. ... purchase ergonomic seating, cafeteria tables, book trucks and carts at discounted pricing without ...
Breaking Biology Technology: