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El noreste de América del Norte como refugio potencial para los bosques boreales en un clima más cálido

L D'Orangeville¹, L Duchesne², D Houle³

¹Centre d'Étude de la Forêt, Université du Québec à Montréal, Case Postale 8888, Succursale Centre-Ville, Montreal, Quebec H3C 3P8, Canada. Department of Biology, Indiana University, 1001 East 3rd Street, Jordan Hall 142, Bloomington, IN 47405-7005, United States.

Science (New York, N.Y.)

|June 18, 2016

Resumen

Los bosques boreales en el noreste de América del Norte pueden beneficiarse de un clima más cálido. Las temperaturas más altas mejoran el crecimiento del abeto negro al norte de 49 ° N, lo que sugiere que esta región podría ser un refugio climático.

Área de la Ciencia:

Ecología
Ciencia del cambio climático
Sector forestal

Sus antecedentes:

Los bosques boreales se enfrentan a una creciente demanda de evaporación debido al aumento de las temperaturas.
El papel de la alta precipitación en la mitigación de estos efectos en el noreste de América del Norte no está bien establecido.

Objetivo del estudio:

Investigar el impacto del cambio climático en el crecimiento del abeto negro en Quebec, Canadá.
Para determinar si los bosques boreales del noreste pueden actuar como un refugio climático.

Principales métodos:

Análisis de los datos de anillos de árboles de 16.450 árboles de abeto negro a lo largo de 583.000 km
Examinar la correlación entre el crecimiento de los árboles, la temperatura y la precipitación a través de un gradiente latitudinal.

Principales resultados:

Se observó un cambio latitudinal en las correlaciones de crecimiento al sur y al norte de 49°N.
Al norte de 49°N, las temperaturas más cálidas influyeron positivamente en el crecimiento del abeto negro, anulando la disponibilidad reducida de agua.
El noreste de América del Norte muestra potencial como refugio climático.

Conclusiones:

Las temperaturas más cálidas y las temporadas de crecimiento más largas benefician el crecimiento del abeto negro al norte de 49°N en Quebec.
Los bosques boreales del noreste pueden servir como refugio de los impactos del cambio climático observados en otros lugares.
Los patrones de precipitación juegan un papel crucial en la resiliencia de los bosques al cambio climático.

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