Bergmann's Rule – what's in a name?

Meiri, Shai

doi:10.1111/j.1466-8238.2010.00577.x

Cited by 223 publications

(227 citation statements)

References 53 publications

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“…In general, body size greatly affects thermoregulation through its effects on energy and water requirements allowing higher resistance and resilience to environmental conditions Hassall 2006, Gardner et al 2011). Alternatively, smaller body size could simply reflect non-adaptive variation triggered by the direct and/or indirect effect of more stressful conditions and marginal sites (Meiri 2011); e.g., a negative effect of heat stress proteins production on growth rate (Tomanek 2010).…”

Section: Demographic Life-history and Morphological Variablesmentioning

confidence: 99%

Closer to the rear edge: ecology and genetic diversity down the core‐edge gradient of a marine macroalga

Zardi

Nicastro²,

Serrão³

et al. 2015

Ecosphere

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Abstract. A fundamental goal in ecology is to understand distribution and abundance of species.Peripheral populations inhabiting the trailing-edge of a species' distribution may carry considerable ecological and evolutionary value yet being most threatened under predicted climate change scenarios. However, the nature of species distributional limits and the ecological and genetic implications of living at low latitude rear edges remain unclear. The assumption that population abundance declines towards range edges, where environmental selective pressure increases, is the basis of a wide range of ecological and evolutionary predictions. Empirical data have provided contrasting evidence about the consequences of living at low latitude distributional limits, raising concerns regarding their generality and highlighting the need for combined multidisciplinary tests. Here, we provide a long-term, comprehensive evaluation of latitudinal patterns in genetic diversity, demographic, morphological and life history traits in the marine macroalga Fucus guiryi.The center to edge transition was mirrored by increasing water and air temperature gradients, with sea surface temperature of coldest months being the most relevant influence on F. guiryi traits. Overall, we identified a strong correlation between ecological data, collected over one year at bimonthly intervals, and distance to the range center. We found decreasing population and individual size towards distributional margins. Similarly, reproductive capacity, threshold size for reproduction, density of reproductive population and recruitment rates showed a core to edge reduction. Temporal variability of individual reproductive effort and recruitment rates did not conform to the general pattern. In contrast, population genetic data did not show a core-edge gradient, as gene diversity and allelic richness were not significantly lower at edge populations, contradicting predictions of higher drift and bottlenecks for smaller edge populations.The contrasting support provided by genetic and ecological data highlights the need to combine multiple and cross-disciplinary evidence for a comprehensive understanding of ecological and evolutionary mechanisms linked to species ranges.

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Section: Demographic Life-history and Morphological Variablesmentioning

confidence: 99%

Closer to the rear edge: ecology and genetic diversity down the core‐edge gradient of a marine macroalga

Zardi

Nicastro²,

Serrão³

et al. 2015

Ecosphere

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“…Large-scale patterns in trait variation that we see today are a major source of phenotypic diversity (Mayr 1956;Blackburn et al 1999;Ackerly and Cornwell 2007;Lepš et al 2011;Meiri 2011). Spatial variation in body size is one such pervasive pattern.…”

Section: Introductionmentioning

confidence: 99%

Untangling Intra- and Interspecific Effects on Body Size Clines Reveals Divergent Processes Structuring Convergent Patterns in Anolis Lizards

Muñoz

Wegener

Algar

2014

The American Naturalist

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JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.. abstract: Bergmann's rule-the tendency for body size to increase in colder environments-remains controversial today, despite 150 years of research. Considerable debate has revolved around whether the rule applies within or among species. However, this debate has generally not considered that clade-level relationships are caused by both intra-and interspecific effects. In this article, we implement a novel approach that allows for the separation of intra-and interspecific components of trait-environment relationships. We apply this approach to body size clines in two Caribbean clades of Anolis lizards and discover that their similar body size gradients are constructed in very different ways. We find inverse Bergmann's clines-highelevation lizards are smaller bodied-for both the cybotes clade on Hispaniola and the sagrei clade on Cuba. However, on Hispaniola, the inverse cline is driven by interspecific differences, whereas intraspecific variation is responsible for the inverse cline on Cuba. Our results suggest that similar body size clines can be constructed through differing evolutionary and ecological processes, namely, through local adaptation or phenotypic plasticity (intraspecific clines) and/or size-ordered spatial sorting (interspecific clines). We propose that our approach can help integrate a divided research program by focusing on how the combined effects of intra-and interspecific processes can enhance or erode clade-level relationships at large biogeographic scales.

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“…Following such adaptations, both homeotherms and poikilotherms still evolved throughout years of evolution. There are not just advantages to internally regulating temperature: Homeotherms for example are also much more sensitive to the environment, as homeotherms closer to the equator are much smaller, a rule that poikilotherms are much less sensitive to (cf., Bergmann's rule; Meiri, 2011).…”

Section: Further Distinguishing Humans From Penguins: Thermoregulatiomentioning

confidence: 99%

People as Penguins: Thermoregulation as Part of the Human Essence

IJzerman¹,

Hogerzeil²

2017

Preprint

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In this chapter we provide an overview of the domain of social thermoregulation. Our overview suggests that humans have always relied on, and still rely on, thermoregulation to navigate their social environment. In outlining social thermoregulation as a crucial feature of the human essence, we focus on the continuity of thermoregulatory mechanisms from other animals to humans. We then provide a number of different effects from the social psychological literature that helps us understand how thermoregulation is implicated in social behavior. From there on, we seek to understand our brain as a “hierarchically organized prediction machine” that helps us keep temperature at optimal levels. By then, it should be clear how thermoregulation is part of our human essence, how it changes our thoughts about others, and alters our motivations to be with others. We end by pointing to the implications of understanding thermoregulation as human essence.

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Bergmann's Rule – what's in a name?

Cited by 223 publications

References 53 publications

Closer to the rear edge: ecology and genetic diversity down the core‐edge gradient of a marine macroalga

Closer to the rear edge: ecology and genetic diversity down the core‐edge gradient of a marine macroalga

Untangling Intra- and Interspecific Effects on Body Size Clines Reveals Divergent Processes Structuring Convergent Patterns in Anolis Lizards

People as Penguins: Thermoregulation as Part of the Human Essence

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