Convergent Isobilateral Leaves Increase the Risk for Mangroves Facing Human-Induced Rapid Environmental Changes

Area of Science:

• Plant biology
• Evolutionary genetics
• Ecology

Background:

• Understanding plant adaptations to extreme environments is vital for survival.
• Genetic mechanisms of adaptation and response to human-induced rapid environmental change (HIREC) remain understudied.
• Convergent evolution, where unrelated species independently evolve similar traits, is a key evolutionary process.

Purpose of the Study:

• To investigate genetic convergence in isobilateral leaf development among mangrove species.
• To identify the genetic basis and selection pressures driving convergent leaf evolution in mangroves.
• To assess the impact of HIREC on mangrove species with convergent adaptive traits.

Main Methods:

• Comparative genomic analysis of mangrove species with isobilateral leaves.
• Identification of gene families and pathways under selection.
• Ecological niche modeling under various climate change scenarios.

Main Results:

• Evidence of genetic convergence in genes related to leaf abaxial and adaxial development.
• Strong selection pressures detected in photosynthesis and leaf polarity pathways.
• Mangroves with isobilateral leaves occupy narrower niches and face habitat loss under HIREC.

Conclusions:

• Convergent evolution in mangroves enhances local adaptation but can increase vulnerability to environmental change.
• Genetic adaptations, while beneficial locally, may not confer resilience to rapid global changes.
• Conservation strategies must consider the interplay of adaptive traits and environmental change for effective biodiversity protection.