The Effects of Size and Isolation on the Conservation Value of Wooded Sites in Britain

Helliwell, D. R.

doi:10.2307/3037984

Cited by 84 publications

(44 citation statements)

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“…Thus, no species-area relations were found for park trees and shrubs. This corresponds with some similar findings, which stressed that intensive human-induced disturbance would change the natural succession processes and patterns (Helliwell 1976;Lawesson et al 1998). It illustrates that in highly human-disturbed areas, the area of green cover might be an indicator only for the amount of urban green space, and would be a biased indicator if used to evaluate biodiversity.…”

Section: Discussionsupporting

confidence: 87%

Plant species composition in relation to green cover configuration and function of urban parks in Beijing, China

Liu

Ouyang

Meng

et al. 2005

Ecological Research

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Plant species composition in relation to green cover configuration and function of urban parks in Beijing, China Abstract Parks, as one specific type of urban open space, play important roles in the conservation of urban biodiversity and provision of recreational services for local residents. As there is a lack of specific insight into park plant species composition in relation to park features, 24 sample parks within the inner city of Beijing, the capital of China, were studied by stratified random plot sampling of their tree, shrub, and herbaceous communities, respectively, in order to investigate how human activities have influenced park green cover configuration and floristic characteristics. The quantitative correlation of species richness and the park green cover indices (patch size, shape, etc.) were studied. The importance value index for plant species (trees, shrubs, and herbaceous species) of each park was calculated. The two-way indicator species analysis approach (TWINSPAN) was applied to classify the 24 parks into different groups based on their species assemblages. Two-hundred and eighty-eight species were recorded within the 24 study parks, belonging to 184 genera and 72 families dominated by Gramineae, Compositae, and Leguminosae. Among all the recorded species, 41% are exotic. The species occurrence, abundance and diversity vary significantly among different parks. Besides the positive correlation (R=0.505, P<0.05) between herbaceous species abundance and the park green cover size, no other significant relations were found between the species abundance and other indices of park green cover configuration. Remarkably, the TWINSPAN classification resulted in a good discrimination between park functional types and the variation in their species assemblage. For the parks of similar age (development history) or landscape design, their species assemblages show more similarity. The methodology adopted and results can be employed to improve baseline information on urban plant ecology and support the setting of priorities for future park management and vegetation protection.

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Section: Discussionsupporting

confidence: 87%

Plant species composition in relation to green cover configuration and function of urban parks in Beijing, China

Liu

Ouyang

Meng

et al. 2005

Ecological Research

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“…Whitcomb et al (1981) also concluded that isolation affects the number of forest interior birds in small woods. Contrarily Helliwell (1976) found no evidence that either the density of woods in the neighbourhood or the distance to other woodland areas had any effect on the number of breeding birds in British woods. This paper deals with woodland birds in small woods (mostly less than 50 ha) in the Rhine valley in The Netherlands.…”

Section: Introductionmentioning

confidence: 83%

The Effect of Isolation on the Number of Woodland Birds in Small Woods in the Netherlands

Opdam¹,

Dorp²,

Braak³

1984

Journal of Biogeography

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“…However, as raised by Helliwell (1976) then Haila (2002), this ensuing species-area relationship says nothing about the effects of isolation, a central point in MacArthur and Wilson (1967), and simply supports the universal axiom that habitat area is related to species richnessa fact seemingly neglected in the fragmentation literature (Haila 2002).…”

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confidence: 84%

Forest fragmentation and forest management: A plea for empirical data

D’Eon¹

2002

The Forestry Chronicle

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Forest fragmentation is one of the most important conservation issues of recent times. Most of what we know about forest fragmentation is based on speculation and untested theory due to a paucity of empirical data. The lack of empirical data can be attributed to (1) the extreme difficulty in conducting good fragmentation studies, and (2) confusion between habitat loss and fragmentation effects. Empirical data from well-designed fragmentation studies is direly needed to validate theoretical predictions stemming from the fragmentation paradigm. Since the best data will come from landscape-scale experiments in managed forests, partnerships and support from researchers and forest managers is critical in this pursuit.Key words: empirical data, forest fragmentation, landscape spatial patterns Le morcellement forestier constitue l'un des plus important enjeu de conservation en ce moment. La plupart des connaissances que nous avons en matière de morcellement forestier repose sur des spéculations et une théorie non éprouvée à cause de la rareté des données empiriques. L'absence de données empiriques peut être attribuée à (1) l'extrême difficulté liée à la réalisation d'études de morcellement adéquates, et (2) à la confusion existante entre la perte d'habitat et les effets du morcellement. Les données empiriques provenant d'études de morcellement réalisées adéquatement sont par conséquence nécessaires pour valider les prédictions théoriques découlant du paradigme du morcellement. Compte tenu que les meilleures données proviendront des essais à l'échelle du paysage qui seront réalisés dans les forêts aménagées, des partenariats et l'entraide entre les chercheurs et les aménagistes forestiers sont essentiels.

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The Effects of Size and Isolation on the Conservation Value of Wooded Sites in Britain

Cited by 84 publications

References 6 publications

Plant species composition in relation to green cover configuration and function of urban parks in Beijing, China

Plant species composition in relation to green cover configuration and function of urban parks in Beijing, China

The Effect of Isolation on the Number of Woodland Birds in Small Woods in the Netherlands

Forest fragmentation and forest management: A plea for empirical data

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