Rapid evolution in response to introduced predators II: the contribution of adaptive plasticity

Latta, Leigh C.; Bakelar, Jeremy; Knapp, Roland A.; Pfrender, Michael E.

doi:10.1186/1471-2148-7-21

Cited by 54 publications

(32 citation statements)

References 58 publications

(49 reference statements)

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“…A comparison of Daphnia melanica from lakes in the Sierra Nevada of CA, USA, with and without a history of fish introductions showed that introduced predators drove Daphnia towards smaller body sizes and earlier reproduction [59]. These fixed genetic differences among populations were further augmented by contributions of adaptive plasticity in response to chemical cues from salmonid fish [60].…”

Section: (B) Antipredator Traitsmentioning

confidence: 99%

Linking genes to communities and ecosystems: Daphnia as an ecogenomic model

et al. 2012

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How do genetic variation and evolutionary change in critical species affect the composition and functioning of populations, communities and ecosystems? Illuminating the links in the causal chain from genes up to ecosystems is a particularly exciting prospect now that the feedbacks between ecological and evolutionary changes are known to be bidirectional. Yet to fully explore phenomena that span multiple levels of the biological hierarchy requires model organisms and systems that feature a comprehensive triad of strong ecological interactions in nature, experimental tractability in diverse contexts and accessibility to modern genomic tools. The water flea Daphnia satisfies these criteria, and genomic approaches capitalizing on the pivotal role Daphnia plays in the functioning of pelagic freshwater food webs will enable investigations of eco-evolutionary dynamics in unprecedented detail. Because its ecology is profoundly influenced by both genetic polymorphism and phenotypic plasticity, Daphnia represents a model system with tremendous potential for developing a mechanistic understanding of the relationship between traits at the genetic, organismal and population levels, and consequences for community and ecosystem dynamics. Here, we highlight the combination of traits and ecological interactions that make Daphnia a definitive model system, focusing on the additional power and capabilities enabled by recent molecular and genomic advances.

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Section: (B) Antipredator Traitsmentioning

confidence: 99%

Linking genes to communities and ecosystems: Daphnia as an ecogenomic model

et al. 2012

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“…The calibration constraints used for each tree are summarized in electronic supplementary material, table S3 [13][14][15][24][25][26]. Phylogeny reconstruction assumed the general time-reversible substitution model [27] with gamma-distributed rate heterogeneity. For protein-coding genes, we assumed separate rates for the three codon positions.…”

Section: Methodsmentioning

confidence: 99%

“…The diatom tree (electronic supplementary material, figure S2) was constructed with the 18S rRNA and rbcL genes. Bayesian tree reconstruction and dating were conducted using BEAST software [23]. The calibration constraints used for each tree are summarized in electronic supplementary material, table S3 [13][14][15][24][25][26].…”

Section: Methodsmentioning

confidence: 99%

Adaptive signals in algal Rubisco reveal a history of ancient atmospheric carbon dioxide

Young

Rickaby

Kapralov

et al. 2012

Phil. Trans. R. Soc. B

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Rubisco, the most abundant enzyme on the Earth and responsible for all photosynthetic carbon fixation, is often thought of as a highly conserved and sluggish enzyme. Yet, different algal Rubiscos demonstrate a range of kinetic properties hinting at a history of evolution and adaptation. Here, we show that algal Rubisco has indeed evolved adaptively during ancient and distinct geological periods. Using DNA sequences of extant marine algae of the red and Chromista lineage, we define positive selection within the large subunit of Rubisco, encoded by rbcL, to occur basal to the radiation of modern marine groups. This signal of positive selection appears to be responding to changing intracellular concentrations of carbon dioxide (CO 2 ) triggered by physiological adaptations to declining atmospheric CO 2 . Within the ecologically important Haptophyta (including coccolithophores) and Bacillariophyta (diatoms), positive selection occurred consistently during periods of falling Phanerozoic CO 2 and suggests emergence of carbon-concentrating mechanisms. During the Proterozoic, a strong signal of positive selection after secondary endosymbiosis occurs at the origin of the Chromista lineage (approx. 1.1 Ga), with further positive selection events until 0.41 Ga, implying a significant and continuous decrease in atmospheric CO 2 encompassing the Cryogenian Snowball Earth events. We surmise that positive selection in Rubisco has been caused by declines in atmospheric CO 2 and hence acts as a proxy for ancient atmospheric CO 2 .

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“…Some authors have suggested that the phenomenon of crypsis is rather ubiquitous across all animal phyla and regions [15]. On the other hand, a study firmly grounded in evolutionary theory has suggested that groups living in environments with strong directional selection might be subject to morphological crypsis more often [16].…”

Section: Introductionmentioning

confidence: 99%

Can Environment Predict Cryptic Diversity? The Case of Niphargus Inhabiting Western Carpathian Groundwater

et al. 2013

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In the last decade, several studies have shown that subterranean aquatic habitats harbor cryptic species with restricted geographic ranges, frequently occurring as isolated populations. Previous studies on aquatic subterranean species have implied that habitat heterogeneity can promote speciation and that speciation events can be predicted from species’ distributions. We tested the prediction that species distributed across different drainage systems and karst sectors comprise sets of distinct species. Amphipods from the genus Niphargus from 11 caves distributed along the Western Carpathians (Romania) were investigated using three independent molecular markers (COI, H3 and 28S). The results showed that: 1) the studied populations belong to eight different species that derive from two phylogenetically unrelated Niphargus clades; 2) narrow endemic species in fact comprise complexes of morphologically similar species that are indistinguishable without using a molecular approach. The concept of monophyly, concordance between mitochondrial and nuclear DNA, and the value of patristic distances were used as species delimitation criteria. The concept of cryptic species is discussed within the framework of the present work and the contribution of these species to regional biodiversity is also addressed.

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Rapid evolution in response to introduced predators II: the contribution of adaptive plasticity

Cited by 54 publications

References 58 publications

Linking genes to communities and ecosystems: Daphnia as an ecogenomic model

Linking genes to communities and ecosystems: Daphnia as an ecogenomic model

Adaptive signals in algal Rubisco reveal a history of ancient atmospheric carbon dioxide

Can Environment Predict Cryptic Diversity? The Case of Niphargus Inhabiting Western Carpathian Groundwater

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