Consequences of Deforestation on Functional Community Structure Reverse at High Elevations.

Area of Science:

• Ecology
• Biodiversity Research
• Conservation Biology

Background:

• Functional diversity is anticipated to decline after land conversion, but empirical results vary.
• The interaction between land conversion and existing community assembly factors (e.g., temperature, elevation) influences functional diversity changes.
• Anolis lizards on Hispaniola provide a model system to study these effects due to their distinct ecomorphs and habitat partitioning.

Purpose of the Study:

• To investigate how deforestation affects the functional structure of Anolis lizard communities along an elevation gradient in Hispaniola.
• To determine if land conversion's impact on functional diversity is mediated by environmental filters like temperature and elevation.
• To assess changes in functional richness, evenness, and spatial turnover in response to deforestation.

Main Methods:

• Compared functional diversity of Anolis lizard communities in forested and deforested habitats across an elevation gradient.
• Utilized morphological traits (body size, limb/tail length, toepad width) as proxies for ecomorphological functional diversity.
• Analyzed changes in functional richness, evenness, and spatial turnover.

Main Results:

• Deforestation had minimal impact on functional richness at low elevations.
• At high elevations, deforestation increased functional richness and evenness, making communities resemble those at lower elevations.
• Deforestation reduced spatial turnover and led to the loss of morphologically unique species, particularly at higher elevations.

Conclusions:

• The effect of land conversion on functional diversity is context-dependent, influenced by environmental filters.
• Deforestation can relax environmental constraints (e.g., thermal limits) at high elevations, increasing functional diversity but potentially reducing uniqueness.
• Understanding these interactions is crucial for predicting biodiversity responses to land-use change and informing conservation strategies.