Climate-mediated hybridization and the future of Andean forests

This is a Preprint and has not been peer reviewed. This is version 1 of this Preprint.

Add a Comment

You must log in to post a comment.


Comments

There are no comments or no comments have been made public for this article.

Downloads

Download Preprint

Authors

Ellen Quinlan, Craig A. Layman , Miles R Silman

Abstract

The tropical Andes face unprecedented warming and shifting precipitation patterns due to climate change and land-use alteration, challenging the futures of Andean forests. During the Quaternary, many Andean trees responded to climate change through upslope migrations, but while there is evidence of ongoing upslope migrations in many species, they are at rates far below what is need to remain in equilibrium with current climate. Similarly, given the number of generations required for adaptation and the long life-spans of many tropical trees, it is unlikely that most species will be able to adapt fast enough. This synthesis explores the role of migration induced secondary contact and hybridization as potential mechanisms for accelerating the adaptive response Andean forests. Hybridization, historically underappreciated in tropical trees, is increasingly recognized as an important driver of speciation and ecological diversity. It may facilitate gene flow and introgression, providing novel genetic combinations that enhance species resilience to climate change. This process can generate new allelic diversity, allowing species to adapt more rapidly than through mutation alone. However, hybridization can also lead to negative outcomes like genetic swamping and outbreeding depression. Conservation strategies should consider the potential benefits and risks of hybridization in maintaining biodiversity under changing environmental conditions. As habitat fragmentation and deforestation exacerbate the challenges faced by these forests, preserving habitat connectivity will be crucial to facilitate migration and gene flow, potentially aiding the survival of many Andean tree species in the Anthropocene.

DOI

https://doi.org/10.32942/X2BS6X

Subjects

Life Sciences

Keywords

climate change, tropical montane forests, conservation, introgression, migration, adaptation, biodiversity, gene flow, Andes, climate changeAndes, tropical montane forests, conservation, Introgression, migration, adaptation, biodiversity, gene flow, hybridization

Dates

Published: 2024-06-04 18:36

License

No Creative Commons license

Additional Metadata

Language:
English

Conflict of interest statement:
None

Data and Code Availability Statement:
Not applicable