Nitrogen dynamics during ecosystem development in tropical forest restoration

被引:66
作者
Amazonas, Nino Tavares [1 ]
Martinelli, Luiz Antonio [2 ]
Piccolo, Marisa de Cassia [2 ]
Rodrigues, Ricardo Ribeiro [1 ]
机构
[1] Univ Sao Paulo, ESALQ, Dept Ciencias Biol, Lab Ecol & Restauracao Florestal, BR-13418900 Piracicaba, SP, Brazil
[2] Univ Sao Paulo, CENA, Lab Ecol Isotop, BR-13416000 Piracicaba, SP, Brazil
关键词
Nitrogen dynamics; Ecological restoration; N-15 natural abundance; N mineralization; N/P Economy Index; Nutrients cycling; SOIL; ACCUMULATION; CARBON; STOICHIOMETRY; DOMINANCE;
D O I
10.1016/j.foreco.2011.07.003
中图分类号
S7 [林业];
学科分类号
0829 ; 0907 ;
摘要
We considered whether ecological restoration using high diversity of native tree species serves to restore nitrogen dynamics in the Brazilian Atlantic Forest. We measured delta N-15 and N content in green foliage and soil; vegetation N:P ratio; and soil N mineralization in a preserved natural forest and restored forests of ages 21 and 52 years. Green foliage delta N-15 values, N content, N:P ratio, inorganic N and net mineralization and nitrification rates were all higher, the older the forest. Our findings indicate that the recuperation of N cycling has not been achieved yet in the restored forests even after 52 years, but show that they are following a trajectory of development that is characterized by their N cycling intensity becoming similar to a natural mature forest of the same original forest formation. This study demonstrated that some young restored forests are more limited by N compared to mature natural forests. We document that the recuperation of N cycling in tropical forests can be achieved through ecological restoration actions. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码:1551 / 1557
页数:7
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