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arXiv 1405.6944nlin.AOq-bio.PE
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在菲律宾的单种$Rhizophora\; mucronata$人工林中,模拟现场盐度和淹没对长期生长轨迹和碳封存的影响

Simulated effects of site salinity and inundation on long-term growth trajectory and carbon sequestration in monospecific $Rhizophora\; mucronata$ plantation in the Philippines

Drandreb Earl Juanico, Severino Salmo

摘要:

提出了一个沿海森林生长的数学模型,以描述和测试的长期生长性能和固碳的单种红树林($Rhizophora\; mucronata$)在菲律宾的人工林的盐和淹没的影响。我们用异速生长来表达红树林的生长方程,用随机性来安排推动红树林发展的种群级事件。分析模型揭示了一个指数,$ξ$,可用于评估战略,可以促进最佳的碳储存积累,从长远来看。如果初始地块被配置为使得$ξ> 1$,则$R.\; mucronata$种植园可以在种植后大约$200$至$250$年内实现$1000\mbox{ t/ha}$或大约$500\mbox{ tC/ha}$的每公顷地上生物量(AGB)。相比之下,菲律宾目前实施的恢复战略与$ξ<1$的情况相对应。因此,如果没有昂贵的人力援助,如经常重新种植,恢复的红树林就无法实现稳定增长。相反,通过这种典型的策略,在没有援助的情况下,AGB随着时间的推移而减少,直到所有的树木死亡。因此,可以对红树林恢复进行战略规划,以减少执行工作的费用和浪费。因此,拟议的指数$ξ$可作为红树林恢复进展或消亡的早期指标。

英文摘要:

A mathematical model of coastal forest growth is proposed to describe and test the effects of salinity and inundation in the long-term growth performance and carbon sequestration of monospecific mangrove ($Rhizophora\; mucronata$) plantation in the Philippines. We used allometry in expressing the mangrove growth equation, and stochasticity in scheduling population-level events that drive the development of the mangrove forest. Analysis of the model unveils an index, $ξ$, that could be used in assessing a strategy which could promote optimum carbon-stock accumulation in the long run. If initial plot is configured such that $ξ> 1$, the $R.\; mucronata$ plantations could achieve an above-ground biomass per hectare (AGB) of $1000\mbox{ t/ha}$, or about $500\mbox{ tC/ha}$, in approximately $200$ to $250$ years post planting. In contrast, the current restoration strategy implemented in the Philippines corresponds to the case that $ξ<1$. Consequently, the restored mangroves could not achieve stable growth without the support of costly human assistance such as frequent replanting. Rather, through that typical strategy and in the absence of assistance, the AGB decreases with time until all trees die. Mangrove restoration could therefore be planned strategically to mitigate costly and wasteful implementation. The proposed index $ξ$ thus serves as an early indicator for the progress or demise of restored mangroves.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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