Ecological occurrence of the endangered Japanese red maple, Acer pycnanthum: base line for ecosystem conservation
Ecological occurrence of the endangered Japanese red maple, Acer pycnanthum: base line for ecosystem conservation
复制标题
濒危日本红枫的生态发生：生态系统保护的基线
DOI：
10.1007/s11355-005-0015-z
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发表时间：
2005
影响因子：
2
通讯作者：
I. Saeki
中科院分区：
文献类型：
--
作者：
I. Saeki
日本红枫、尖叶槭.科赫，是一种濒危的枫树物种，在日本本州中部的湿地中具有非常有限的自然范围。尽管它的濒危状态，缺乏系统的保护行动。我的目标是开发一个全面的数据库和生态系统的生态描述支持物种，以促进其保护。我通过文献检索、对当地居民的采访以及空中和地面调查来确定它们的位置。分析了各站点的生态特征和保护现状。在四个省确定了52个主要地点。超过一半的网站要么不为人知，要么不广为人知。航空测量在确定新的和大量人口的位置方面最为重要。以日本红枫为主的生态系统集中在海拔300米至600米的沿着三个主要河谷，天然森林已显着改变。种群在生态环境、地理位置、胸径分布和管理历史上具有高度多样性。记录的克隆总数为1 603个，是上次估计的三倍多。然而，支持日本红枫的湿地生态系统的规模非常小，通常≤0.5公顷。幼苗再生仅限于与农业有关的人为干扰盛行的开放湿地。16个地点已被指定为天然古迹，管理重点是日本红枫，通常简化生态系统的组成和结构。另外，生态系统的方法，保护整个湿地生态系统，应强调，在这项研究中获得的基线数据将鼓励各种新的保护措施。
Japanese red maple,Acer pycnanthumK. Koch, is an endangered maple species with a very restricted natural range in the wetlands of central Honshu, Japan. In spite of its endangered status, systematic conservation action is lacking. My objective was to develop a comprehensive database and ecological description of ecosystems supporting the species to stimulate its conservation. I employed literature searches, interviews with local residents, and aerial and ground survey to determine their locations. Also, ecological characteristics and conservation status for each site were analyzed. Fifty-two main sites were identified in four prefectures. More than half of the sites were either unknown or not widely known. Aerial survey was most important in locating new and large populations. Ecosystems dominated by Japanese red maple are concentrated in the elevational range from 300 m to 600 m along three major river valleys where natural forests have been markedly altered. The populations are highly diverse in their ecological setting, geographic location, dbh distribution, and management history. The total number of clones recorded, 1,603, is over three times that of the last estimate. However, the size of wetland ecosystems supporting Japanese red maple is very small, usually ≤0.5 ha. Seedling regeneration is limited to open wetlands where human disturbances associated with agriculture prevail. Sixteen sites have been designated natural monuments where management focuses on Japanese red maple and typically simplifies the ecosystem composition and structure. Alternatively, an ecosystem approach, conserving entire wetland ecosystems, should be emphasized, and the base-line data obtained in this study will encourage various new conservation initiatives.