The effect of patch constellation on the exchange of individuals between habitat-islands

Pfenning, Brenda; Hovestadt, Thomas; Poethke, Hans Joachim

doi:10.1016/j.ecolmodel.2004.04.035

Cited by 17 publications

(11 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Alternatively, smaller patches might support lower abundance and diversity of insects, as reported from mature forest fragments (Whitcomb et al, 1981;Burke and Nol, 1998). The greater abundance of mature forest species in larger patches of early-successional habitat could also result from the ease of finding a larger target (Pfenning et al, 2004). If birds depart their nesting sites in forests to search the landscape for discrete, early-successional habitats, a larger site may be more likely to be located.…”

Section: Discussionmentioning

confidence: 97%

Do mature forest birds prefer early-successional habitat during the post-fledging period?

Chandler

King

Chandler

2012

Forest Ecology and Management

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 97%

Do mature forest birds prefer early-successional habitat during the post-fledging period?

Chandler

King

Chandler

2012

Forest Ecology and Management

View full text Add to dashboard Cite

“…In addition, circular patches can maintain higher species richness and population densities through circularization of territory shape (Eason 1992; Eason & Stamps 1992), diminished negative edge effects (Laurance & Yensen 1991; Ewers & Didham 2007), and decreased emigration from patches (Stamps et al 1987; Bevers & Flather 1999). Nevertheless, circularization of patches can cause decreased population densities by reducing immigration because a complex patch shape can increase immigration (Haddad & Baum 1999; Pfenning et al 2004). Therefore, if immigration is a main factor maintaining higher species richness and population densities, circular patches could have lower species richness and population densities in the patches.…”

Section: Introductionmentioning

confidence: 99%

Relative Importance of the Area and Shape of Patches to the Diversity of Multiple Taxa

Yamaura

Kawahara

Iida

et al. 2008

Conservation Biology

View full text Add to dashboard Cite

Although enhancing reserve shape has been suggested as an alternative to enlarging nature reserves, the importance of reserve shape relative to reserve area remains unclear. Here we examined the relative importance of area and shape of forest patches to species richness, species composition, and species abundance (abundance of each species) for 3 taxa (33 birds, 41 butterflies, and 91 forest-floor plants) in a fragmented landscape in central Hokkaido, northern Japan. We grouped the species according to their potential edge responses (interior-, neutral-, and edge-species groups for birds and forest-floor plants, woodland- and open-land-species groups for butterflies) and analyzed them separately. We used a shape index that was independent of area as an index of shape circularization. Hierarchical partitioning and variation partitioning revealed that patch area was generally more important than patch shape for species richness and species composition of birds and butterflies. For forest-floor plants, effects of patch area and shape were small, whereas effects of local forest structure were large. Patch area and circularization generally increased abundances of interior species of birds and forest-floor plants and woodland species of butterflies. Nevertheless, only patch circularization increased abundances of 1 woodland species of butterfly and 2 and 6 interior species of birds and forest-floor plants, respectively. We did not find any significant interaction effects between patch area and shape. Our results suggest that although reserves generally should be large and circular, there is a trade-off between patch area and shape, which should be taken into consideration when managing reserves.

show abstract

“…The ‘shading effect’ of some newly created patches is another interesting result of our study; while theoretical papers have indicated the possibility of such an effect (Hein et al . ; Pfenning, Hovestadt & Poethke ; Heinz et al . ), our results provide an important demonstration of its potential significance for conservation, further highlighting the value of mechanistic dispersal modelling.…”

Section: Discussionmentioning

confidence: 99%

The importance of realistic dispersal models in conservation planning: application of a novel modelling platform to evaluate management scenarios in an Afrotropical biodiversity hotspot

Aben

Bocedi

Palmer

et al. 2016

Journal of Applied Ecology

View full text Add to dashboard Cite

Summary As biodiversity hotspots are often characterized by high human population densities, implementation of conservation management practices that focus only on the protection and enlargement of pristine habitats is potentially unrealistic. An alternative approach to curb species extinction risk involves improving connectivity among existing habitat patches. However, evaluation of spatially explicit management strategies is challenging, as predictive models must account for the process of dispersal, which is difficult in terms of both empirical data collection and modelling.Here, we use a novel, individual‐based modelling platform that couples demographic and mechanistic dispersal models to evaluate the effectiveness of realistic management scenarios tailored to conserve forest birds in a highly fragmented biodiversity hotspot. Scenario performance is evaluated based on the spatial population dynamics of a well‐studied forest bird species.The largest population increase was predicted to occur under scenarios increasing habitat area. However, the effectiveness was sensitive to spatial planning. Compared to adding one large patch to the habitat network, adding several small patches yielded mixed benefits: although overall population sizes increased, specific newly created patches acted as dispersal sinks, which compromised population persistence in some existing patches. Increasing matrix connectivity by the creation of stepping stones is likely to result in enhanced dispersal success and occupancy of smaller patches. Synthesis and applications. We show that the effectiveness of spatial management is strongly driven by patterns of individual dispersal across landscapes. For species conservation planning, we advocate the use of models that incorporate adequate realism in demography and, particularly, in dispersal behaviours.

show abstract

The effect of patch constellation on the exchange of individuals between habitat-islands

Cited by 17 publications

References 53 publications

Do mature forest birds prefer early-successional habitat during the post-fledging period?

Do mature forest birds prefer early-successional habitat during the post-fledging period?

Relative Importance of the Area and Shape of Patches to the Diversity of Multiple Taxa

The importance of realistic dispersal models in conservation planning: application of a novel modelling platform to evaluate management scenarios in an Afrotropical biodiversity hotspot

Contact Info

Product

Resources

About