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:12/15/2016)... 2016 ... Research and Markets has announced the addition of the ... The report forecasts the global military biometrics market to grow at ... report has been prepared based on an in-depth market analysis with inputs ... prospects over the coming years. The report also includes a discussion of ...
(Date:12/15/2016)... "Increase in mobile transactions is driving the growth of ... expected to grow from USD 4.03 billion in 2015 ... of 29.3% between 2016 and 2022. The market is ... smart devices, government initiatives, and increasing penetration of e-commerce ... to grow at a high rate during the forecast ...
(Date:12/8/2016)... Dec. 8, 2016  Singulex, Inc., the leader in ... entered into a license and supply agreement with Thermo ... agreement provides Singulex access to Thermo Scientific BRAHMS PCT ... is used to diagnose systemic bacterial infection and ... to aid in assessing the risk of critically ...
Breaking Biology News(10 mins):
(Date:1/17/2017)... ... 17, 2017 , ... MS Technologies™ and Bayer have received ... Performance System will combine industry-leading genetics with a double herbicide-tolerant trait that will ... Bean herbicide. The Balance™ GT Soybean Performance System will benefit soybean growers by ...
(Date:1/17/2017)... 17, 2017  An international team of researchers ... St. Boniface Hospital Albrechtsen Research Centre/University of Manitoba ... unmet health need affecting nearly one in 15 ... Investigation, their results identify small molecule drugs with ... neuronal injury in animal models of metabolic, chemical ...
(Date:1/17/2017)... , Jan. 17, 2017  Zimmer Biomet Holdings, Inc. ... and full-year 2016 sales and earnings conference call will ... 31, 2017, at 8 a.m. Eastern Time.  A news ... made available at 7:30 a.m. Eastern Time the morning ... webcast can be accessed via Zimmer Biomet,s Investor Relations ...
(Date:1/17/2017)... , Jan. 17, 2017 Noom ... is the first to offer fully Spanish behavior ... Noom,s Spanish diabetes prevention and healthy ... and accessibility of lifestyle interventions among Hispanic Americans ... conditions. Noom,s robust food database, program-specific curriculum content ...
Breaking Biology Technology: