Impacts of urbanization on mangrove forests and brachyuran crabs in Penang, Malaysia
Impacts of urbanization on mangrove forests and brachyuran crabs in Penang, Malaysia
复制标题
城市化对马来西亚槟城红树林和短蟹的影响
DOI：
10.1007/s10113-021-01800-3
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发表时间：
2021
影响因子：
4.2
通讯作者：
I. Nordhaus
中科院分区：
文献类型：
--
作者：
Johann Stiepani;L. Gillis;S. Chee;M. Pfeiffer;I. Nordhaus
城市发展正在导致马来西亚槟城红树林的丧失和随之而来的破碎化。然而，很少有研究关注城市化对红树林生物多样性的影响。这项研究调查并比较了城市和农村红树林之间的植被和螃蟹组合。总共记录了 5853 棵树，包括来自六科的 15 个物种：棘科、槟榔科、千屈菜科、锦葵科、楝科和红树科。白骨壤占研究中所有树木的 88.6%，具有最高的物种重要性 (IV)。尽管城市（14）和农村（7）红树林的红树林树种总数差异很大，但基于IV的红树林结构没有显着差异。总共记录了 633 只螃蟹，包括来自三个总科的 13 个不同物种： Grapsoidea、Ocypodoidea 和 Paguroidea。城乡之间蟹类丰富度没有差异，但五种蟹类的生物量和四种蟹类的密度差异显着。冗余分析（RDA）表明，土地利用、盐度和白骨壤丰度最能描述蟹类的分布（r2=32.7）。这项研究表明，除了西海岸较大的红树林之外，槟城东海岸较小的分散城市红树林具有相对较高的树木和螃蟹多样性，值得保护。保护小型但相互关联的红树林对于补充其动植物群至关重要，应在决策过程中予以考虑。
Urban development is driving the loss and subsequent fragmentation of mangrove forests in Penang, Malaysia. However, little research has focused on the implications of urbanization onto the biodiversity within mangrove forests. This study investigates and compares both vegetation and crab assemblages between urban and rural mangrove forests. Collectively, 5853 trees were recorded including 15 species from six families: Acanthaceae, Arecaceae, Lythraceae, Malvaceae, Meliaceae, and Rhizophoraceae. Avicennia marina accounted for 88.6% of all trees in the study and held the highest species importance (IV). Although the total number of mangrove tree species varied significantly between urban (14) and rural (7) mangrove forests, the mangrove forest structure based on IV did not vary significantly. In total, 633 crabs were recorded comprising 13 different species from three superfamilies: Grapsoidea, Ocypodoidea, and Paguroidea. Crab species richness did not vary between urban and rural sites, but the biomasses of five and the densities of four crab species varied significantly. Redundancy analysis (RDA) indicated that land use, salinity, and abundance of Avicennia officinalis can best describe the distribution of crab species (r2 =32.7). This study indicates that smaller fragmented urban mangroves at the east coast of Penang have a relatively high tree and crab diversity and are worth protecting, in addition to the larger mangrove forests on the west coast. The preservation of small yet interconnected mangrove sites could be critical to the recruitment of their flora and fauna and should be considered in decision-making processes.