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Tropical cloud forest plant endemism persistence within crop-fallow systems in a Mesoamerican hotspot area
Agroforestry Systems ( IF 2.2 ) Pub Date : 2020-10-14 , DOI: 10.1007/s10457-020-00557-8
Oscar Pérez-García

Tropical montane cloud forests (TMCF) under natural disturbances have shown high endemism in early successional vegetation. However, little is known about anthropogenic disturbances and plant endemism in TMCF under ancient agricultural management. In this sense, I assessed the number of species, abundance, and frequency of endemic vascular plants in temporary plots of cultivated and young fallow areas from two maize-based systems: milpa shifting cultivation (MS) and semi-permanent cropping (SP) in Oaxaca, Mexico. Overall, both agricultural stages and systems harbored endemic species, seven in total, but most of such species were found in the fallow stage than in the cropping stage, and in the MS system than in the SP system. A single Asteraceae herbaceous endemic species (Melampodium mimulifolium) was commonly recorded in cultivated fields, but almost exclusive to the SP cropping system. Seven species were recorded in fallows, where the narrow-range endemic tree species Clethra integerrima (Clethraceae) was the most abundant and frequent, but almost exclusive to the MS cropping system. In more permanent and intensified agricultural systems within biodiversity hotspots, only ruderal endemic herbaceous species can persist. In contrast, in low intensity managed agricultural systems, like ancient agroforestry, not only can endemic tree species prosper, but also restricted endemic trees can be found. Indigenous agricultural systems in biodiversity hotspots should not be seen as a threat, but rather as complementary areas for endemism conservation.

中文翻译:

中美洲热点地区作物休耕系统中热带云雾林植物特有的持久性

自然干扰下的热带山地云林 (TMCF) 在早期演替植被中表现出高度特有性。然而,在古代农业管理下,人们对 TMCF 中的人为干扰和植物特有现象知之甚少。从这个意义上说,我评估了两种以玉米为基础的系统的栽培和幼龄休耕区临时地块中地方性维管植物的物种数量、丰度和频率:米尔帕轮作(MS)和半永久作物(SP)。墨西哥瓦哈卡。总体而言,农业阶段和系统都存在特有物种,共有7种,但大多数此类物种在休耕期发现的比在种植期发现的多,在MS系统中发现的比在SP系统中发现的多。在耕地中通常记录到单一的菊科草本特有物种(Melampodium mimulifolium),但几乎是 SP 裁剪系统独有的。在休耕地记录了七个物种,其中窄范围的特有树种 Clethra integerrima (Clethraceae) 是最丰富和最常见的,但几乎是 MS 种植系统所独有的。在生物多样性热点内更持久和集约化的农业系统中,只有原始的地方性草本物种可以持续存在。相比之下,在低强度管理的农业系统中,如古老的农林业,不仅地方性树种可以繁盛,而且可以找到受限制的地方性树种。生物多样性热点地区的土著农业系统不应被视为威胁,而应被视为地方性保护的补充区域。其中窄范围的特有树种 Clethra integerrima (Clethraceae) 是最丰富和最常见的,但几乎是 MS 种植系统所独有的。在生物多样性热点内更持久和集约化的农业系统中,只有原始的地方性草本物种可以持续存在。相比之下,在低强度管理的农业系统中,如古老的农林业,不仅地方性树种可以繁盛,而且可以找到受限制的地方性树种。生物多样性热点地区的土著农业系统不应被视为威胁,而应被视为地方性保护的补充区域。其中窄范围的特有树种 Clethra integerrima (Clethraceae) 是最丰富和最常见的,但几乎是 MS 种植系统所独有的。在生物多样性热点内更持久和集约化的农业系统中,只有原始的地方性草本物种可以持续存在。相比之下,在低强度管理的农业系统中,如古老的农林业,不仅地方性树种可以繁盛,而且可以找到受限制的地方性树种。生物多样性热点地区的土著农业系统不应被视为威胁,而应被视为地方性保护的补充区域。只有粗野的地方性草本物种可以持续存在。相比之下,在低强度管理的农业系统中,如古老的农林业,不仅地方性树种可以繁盛,而且可以找到受限制的地方性树种。生物多样性热点地区的土著农业系统不应被视为威胁,而应被视为地方性保护的补充区域。只有粗野的地方性草本物种可以持续存在。相比之下,在低强度管理的农业系统中,如古老的农林业,不仅地方性树种可以繁盛,而且可以找到受限制的地方性树种。生物多样性热点地区的土著农业系统不应被视为威胁,而应被视为地方性保护的补充区域。
更新日期:2020-10-14
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