Temperature-dependent sex determination in an uncertain world: Recently, scientific attention has increased around the ecological and evolutionary effects of climate change on species with temperature-dependent sex determination TSD.
Arguably the most significant effect of com change on TSD species will be the imbalance of sex ratios, which, in turn, would threaten population viability. Recent laboratory studies suggest that current climate change may not necessarily result in skewed sex ratios for most TSD species; these observations could challenge the current perception of interplay between climate change com TSD.
Here, I present a brief review of the previous and new insights regarding ecological implications of TSD por to climatic changes. Reptiles have evolved different mechanisms for sex-determination.
In several species, sex is determined by heteromorphic sex chromosome recombination, a process por as genetic sex determination GSD. In contrast, temperature-dependent sex determination TSDwhere sex is determined by thermal conditions experienced in the lability period during gonadal sex, is present in most reptile lineages many turtles, por sphenodontians, a few lizards and all crocodilians studied Bull, ; Pieau, Thus, TSD is a case of phenotypic plasticity where environmental conditions during reproduction represent a powerful driver of population dynamics.
TSD has thus provided an interesting model to understand the interplay between sex ratio selection, sex determination and environmental sex, and thereby the evolutionary significance of phenotypic plasticity Bull, ; Janzen, ; Van Dooren and Leimar, ; Warner and Shine, Recently, the ecological and evolutionary impacts of environmental changes sex TSD species have aroused considerable interest e.
Lesbian girls with dicks interest lies in the hypothesis that TSD species may have an adaptive disadvantage in light of current environmental changes, leading to skewed sex ratios and potentially an increased risk of local population extirpations.
Yet, recent TSD studies suggest that the interplay between sex determination and environment are more complex than has com previously envisioned. These observations have challenged the current perception of potential consequences of environmental changes on TSD species. Here, I discuss some of these new insights regarding TSD species' responses to climatic changes, and the associated ecological implications.
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