Laurance William F
Smithsonian Tropical Research Institute, Apartado 2072, Balboa, Republic of Panamá.
Philos Trans R Soc Lond B Biol Sci. 2004 Mar 29;359(1443):345-52. doi: 10.1098/rstb.2003.1430.
In the tropics, habitat fragmentation alters forest-climate interactions in diverse ways. On a local scale (less than 1 km), elevated desiccation and wind disturbance near fragment margins lead to sharply increased tree mortality, thus altering canopy-gap dynamics, plant community composition, biomass dynamics and carbon storage. Fragmented forests are also highly vulnerable to edge-related fires, especially in regions with periodic droughts or strong dry seasons. At landscape to regional scales (10-1000 km), habitat fragmentation may have complex effects on forest-climate interactions, with important consequences for atmospheric circulation, water cycling and precipitation. Positive feedbacks among deforestation, regional climate change and fire could pose a serious threat for some tropical forests, but the details of such interactions are poorly understood.
在热带地区,栖息地破碎化以多种方式改变森林与气候的相互作用。在局部尺度(小于1公里)上,碎片边缘附近的干燥加剧和风扰导致树木死亡率急剧上升,从而改变林冠间隙动态、植物群落组成、生物量动态和碳储存。破碎化的森林也极易受到边缘相关火灾的影响,尤其是在周期性干旱或旱季强烈的地区。在景观到区域尺度(10 - 1000公里)上,栖息地破碎化可能对森林与气候的相互作用产生复杂影响,对大气环流、水循环和降水产生重要影响。森林砍伐、区域气候变化和火灾之间的正反馈可能对一些热带森林构成严重威胁,但此类相互作用的细节仍知之甚少。