Enzyme activities during litter decomposition of two exotic and two native plant species in hardwood forests of New Jersey
Enzyme activities during litter decomposition of two exotic and two native plant species in hardwood forests of New Jersey
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DOI：
10.1016/s0038-0717(02)00057-3
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发表时间：
2002-09-01
影响因子：
9.7
通讯作者：
Huang, WZ
中科院分区：
文献类型：
--
作者：
Kourtev, PS;Ehrenfeld, JG;Huang, WZ
外来植物物种的入侵可以改变生态系统的特性，包括重要的土壤功能和特性。因此，外来植物和本土植物的凋落物分解也会发生变化，从而导致生态系统功能发生更深刻的变化。我们在这里提出了一个研究过程中的凋落物分解的八种酶的活性，从四种植物，其中两个是成功的外来入侵者在美国东北部落叶林。研究的四个物种是：日本小檗（异国情调），日本高跷草（异国情调），栗子橡树（本地）和黑桦树（本地）。我们测量了酶活性的分解凋落物在两个地点（外来侵扰和本地植被）在两个公园在东北部新泽西。在前2年的分解，酶活性的模式之间的四种类型的凋落物发生显着变化，但是，他们没有受到影响的位置（外来/本地）的分解发生。我们的研究结果清楚地表明，凋落物化学和站点特性是分解凋落物的酶活性的强有力的决定因素。垃圾中的微生物群落很快适应了垃圾化学的差异，因为两种外来物种在分解垃圾中的酶活性模式在外来和本地位置之间几乎无法区分。(C)2002爱思唯尔科技有限公司。保留所有权利。
Invasions by exotic plant species can alter ecosystem properties, including important soil functions and characteristics. As a result, decomposition of litter from the exotic, as well as native plants, can also be altered, leading to more profound changes in ecosystem functioning. We present here a study of eight enzyme activities during the decomposition of litter from four plant species, two of which are successful exotic invaders in Northeastern USA deciduous forests. The four studied species are: Japanese barberry (exotic), Japanese stilt grass (exotic), chestnut oak (native) and black birch (native). We measured enzyme activities in the decomposing litter at two locations (exotics infested and native vegetation) in two parks in Northeastern New Jersey. In the first 2 years of decomposition, patterns of enzyme activites changed significantly among the four types of litter, however, they were not affected by the location (exotic/native) where decomposition was taking place. Our results clearly show that litter chemistry and site characteristics are strong determinants of enzyme activity in decomposing litter. The microbial community in the litter quickly adapted to the differences in litter chemistry, as patterns of enzyme activity in decomposing litter from the two exotic species were virtually indistinguishable between exotic and native locations. (C) 2002 Elsevier Science Ltd. All rights reserved.