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145 results for “life history variation”
Figure 4 in Abundance variations and life history traits of two sympatric species of Neotropical annual fish (Cyprinodontiformes: Rivulidae) in temporary ponds of southern Brazil
Figure 4. Sex ratio for Austrolebias minuano (A) and Cynopoecilus fulgens (B) sampling in temporary ponds of Lagoa do Peixe National Park, southern Brazil, in 2008 and 2009.
Figure 5 in Abundance variations and life history traits of two sympatric species of Neotropical annual fish (Cyprinodontiformes: Rivulidae) in temporary ponds of southern Brazil
Figure 5. Length–weight relationship for Austrolebias minuano (A) and Cynopoecilus fulgens (B) sampled in temporary ponds of Lagoa do Peixe National Park, southern Brazil, in 2008 and 2009.
Figure 6 in Abundance variations and life history traits of two sympatric species of Neotropical annual fish (Cyprinodontiformes: Rivulidae) in temporary ponds of southern Brazil
Figure 6. Condition factor (K) ± SE of Austrolebias minuano (A) and Cynopoecilus fulgens (B) sampled in temporary ponds of Lagoa do Peixe National Park, southern Brazil, in 2008 and 2009.
Figure 2 in Abundance variations and life history traits of two sympatric species of Neotropical annual fish (Cyprinodontiformes: Rivulidae) in temporary ponds of southern Brazil
Figure 2. Mean abundances ± SE of Austrolebias minuano (A) and Cynopoecilus fulgens (B) sampled in temporary ponds of Lagoa do Peixe National Park, southern Brazil, in 2008 and 2009.
Figure 3 in Abundance variations and life history traits of two sympatric species of Neotropical annual fish (Cyprinodontiformes: Rivulidae) in temporary ponds of southern Brazil
Figure 3. Mean standard length (LS) ± SE of Austrolebias minuano (A) and Cynopoecilus fulgens (B) sampled in temporary ponds of Lagoa do Peixe National Park, southern Brazil, in 2008 and 2009.
Data from: Variation in seasonal timing traits and life history along a latitudinal transect in Mimulus ringens
<p>Seasonal timing traits are commonly under recurrent, spatially-variable selection, and are therefore predicted to exhibit clinal variation. Temperate perennial plants often require vernalization to prompt growth and reproduction; however, little is known about whether vernalization requirements change across the range of a broadly distributed species. We performed a critical vernalization duration study in <i>Mimulus ringens, </i>coupled with population genomic analysis. Plants from 8 populations spanning the latitudinal range were exposed to varying durations of 4°C vernalization between 0-56 days, and flowering response was assessed. RADSeq was also performed to generate 1,179 polymorphic SNPs, which were used to examine population structure. We found unexpected life history variation, with some populations lacking vernalization requirement. Population genomic analyses show that these life history variants are highly divergent from perennials, potentially revealing a cryptic species. For perennial populations, minimum vernalization time was surprisingly consistent. However, once vernalized, northern populations flowered almost 3 weeks faster than southern. Further, southern populations exhibited sensitivity to vernalization times beyond flowering competency, suggesting an ability to respond adaptively to different lengths of winter. <i>M. ringens</i> therefore reveals evidence of clinal variation, and provides opportunities for future studies addressing mechanistic and ecological hypotheses both within and between incipient species.</p>
How specialized is a soil specialist? Early life history responses of a rare Eriogonum to site-level variation in volcanic soils
<p><b>Premise of the study</b>: Understanding edaphic specialization is crucial for conserving rare plants that may need relocation due to habitat loss. Focusing on <i>Eriogonum crosbyae</i>, a rare soil specialist in the Great Basin, US, we asked how site-level variation among volcanic soil outcrops affected plant growth and population distribution.</p> <p><b>Methods</b>: We measured emergence, survival, size, and biomass allocation of <i>E. crosbyae</i> seedlings planted into soils collected from forty-two outcrops of actual and potential habitat. We also measured phenotypic variation in the wild, documented abiotic and biotic components of <i>E. crosbyae </i>habitat, re-surveyed Nevada populations, and evaluated occupancy changes over time.</p> <p><b>Key results</b>: Plants responded plastically to edaphic variation, growing larger and allocating relatively more tissue above-ground in soils with greater nutrient availability, and growing smaller in soils higher in copper in the field and the greenhouse. However, the chemical and physical soil properties we measured did not predict site occupancy, nor was plant phenotype in the greenhouse different when plants were grown in soils from sites with different occupation status. We observed occupation status reversals at five locations.</p> <p><b>Conclusions</b>: <i>E. crosbyae </i>performed well in soils formed on hydrothermally altered rocks that are inhospitable to many other plants. Extirpation/colonization events observed were consistent with metapopulation dynamics, which may partially explain <i>E. crosbyae'</i>s patchy distribution among outcrops of potential habitat. While soil properties did not predict site occupancy, early life stages showed sensitivity to soil variation, indicating that seedling dynamics may be important to consider for the conservation of this soil specialist.</p>
Functional variants of DOG1 control seed chilling responses and variation in seasonal life history strategies in Arabidopsis thaliana
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Data from: Genetic variation in HIF signaling underlies quantitative variation in physiological and life history traits within lowland butterfly populations
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Data from: Variation in selective regimes drives intraspecific variation in life-history traits and migratory behaviour along an elevational gradient
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Data from: Seasonal variation in life history traits in two Drosophila species
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Data from: Stochastic population dynamics and life-history variation in marine fish species
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Data from: Floral color variation across life history and geography in Mimulus ringens (Phrymaceae)
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Data from: Elevation and latitude interact to drive life-history variation in precocial birds: a comparative analysis using Galliformes
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Data from: Preadult life history variation determines adult transcriptome expression
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Data from: Life-history characteristics and landscape attributes as drivers of genetic variation, gene flow and fine-scale population structure in Northern Dolly Varden (Salvelinus malma malma) in Canada
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Data from: Tropical tree height and crown allometries for the Barro Colorado Nature Monument, Panama: a comparison of alternative hierarchical models incorporating interspecific variation in relation to life history traits
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Data from: Evolution of asexual Daphnia pulex in Japan: variations and covariations of the digestive, morphological and life history traits
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Data from: Life history as a constraint on plasticity: developmental timing is correlated with phenotypic variation in birds
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Data from: Plant fertilization interacts with life history: variation in stoichiometry and performance in nettle-feeding butterflies.
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International Brain Laboratory public data
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OpenNeuro
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