2009
DOI: 10.1111/j.1600-0587.2008.05515.x
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The importance of samples and isolates for species–area relationships

Abstract: SpeciesÁarea relationships (SARs) are a key tool for understanding patterns of species diversity. A framework for the interpretation of SARs and their prediction under different landscape configurations remains elusive, however. This article addresses one of these configurations: how species' minimum-area requirements affect the shape of island or other isolate speciesÁarea curves. We distinguish between two classes of SARs: sample-area curves, compiled entirely within larger contiguous areas, and isolate curv… Show more

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Cited by 39 publications
(38 citation statements)
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References 82 publications
(122 reference statements)
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“…5; see also Rosenzweig, 1995;Tjørve & Turner, 2009;Triantis et al, 2012). 5; see also Rosenzweig, 1995;Tjørve & Turner, 2009;Triantis et al, 2012).…”
Section: Extinction Debt and Species-area Relationshipsmentioning
confidence: 96%
See 1 more Smart Citation
“…5; see also Rosenzweig, 1995;Tjørve & Turner, 2009;Triantis et al, 2012). 5; see also Rosenzweig, 1995;Tjørve & Turner, 2009;Triantis et al, 2012).…”
Section: Extinction Debt and Species-area Relationshipsmentioning
confidence: 96%
“…2, where the upper curves represent sample areas and the lower curve represents isolates, long-term equilibrium communities. 4 provides a quantitative form for the arguments presented by Preston (1962) and Tjørve & Turner (2009). While the exact form of the loci is different in Fig.…”
Section: The Relative Magnitude Of Delayed and Imminent Extinctionsmentioning
confidence: 99%
“…Species–area curves generated from islands or other types of isolated areas are also termed isolate curves (e.g. Tjørve & Turner, 2009). As early as almost four decades ago, Preston’s (1962a,b) magisterial work discussed differences in slope and curve shape between sample‐area curves and isolate curves (in log–linear space).…”
Section: The Isolate Curvementioning
confidence: 99%
“…breeding habitat, space, nutrients or food), point (or catastrophic) events, and inbreeding (Turner & Tjørve, 2005). Tjørve & Turner (2009, p. 391) state that ‘Minimum‐area effects on actual islands and other isolates predictably cause species–area curves either to be sigmoid in arithmetic space or to be lowered for smaller areas’, and report sigmoid isolate curves in a number of data sets, which cover large‐scale windows going from very fine to coarse scales. Sigmoid curves may not be obtainable for all isolate‐area relationships because the size of islands with no species is so small that it will hardly affect the outcome of the regression.…”
Section: The Isolate Curvementioning
confidence: 99%
“…The general SAR equation, where the species number, S a , is a function of area a , S a = f ( a ), is expected to take the form of a convex-upward decelerating curve16. Similarly, S A−a = f ( A − a ), and S A = f ( A ), where A is the total area.…”
Section: Resultsmentioning
confidence: 99%