Lema Vélez Luisa Fernanda, Polanía Jaime
Universidad Nacional de Colombia Sede Medellin, Colombia.
Rev Biol Trop. 2007 Mar;55(1):11-21.
We registered seedling survival and biomass increase for Rhizophora mangle L., Avicennia germinans L. and Laguncularia racemosa (L.) Gaertn. f, main mangrove species in the Rancheria River delta, Colombia. Only seedlings of R. mangle were found to survive. We also measured maximum rate of litterfall. We estimated annual litterfall through interpolation within an exponential regression performed with maximum and annual litterfall data published in other sources; the value of annual litterfall for the area was estimated to be 12.9 mgha(-1)y(-1). We found a 7.4 mgha(-1)y(-1)(-1) increase in biomass. Litterfall constitutes the larger fraction of the 20.2 mgha(-1)y(-1) productivity of this mangrove. We believe this is a very high value for a forest under unfavorable natural and human conditions, such as high seasonality and continuous use of the forest to feed goats and sheep. We consider that the high productivity is a response to both natural and anthropogenic stress.
我们记录了哥伦比亚兰切里亚河三角洲主要红树林物种红树、白骨壤和拉贡木的幼苗存活率和生物量增加情况。仅发现红树的幼苗存活。我们还测量了凋落物最大速率。我们通过对其他来源公布的最大凋落物量和年凋落物量数据进行指数回归内插来估算年凋落物量；该地区的年凋落物量估计为12.9毫克/公顷·年。我们发现生物量增加了7.4毫克/公顷·年。凋落物占这片红树林20.2毫克/公顷·年生产力的较大比例。我们认为，对于处于不利自然和人为条件下的森林，如季节性强以及持续利用森林来饲养山羊和绵羊，这是一个非常高的值。我们认为高生产力是对自然和人为压力的一种响应。
