Transplantation of native species to existing vegetated slopes: Importance of optimal habitat and initial nutrient reserves
Transplantation of native species to existing vegetated slopes: Importance of optimal habitat and initial nutrient reserves
复制标题
将本地物种移植到现有植被斜坡上：最佳栖息地和初始养分储备的重要性
DOI：
10.1016/j.ecoleng.2019.105708
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发表时间：
2020
影响因子：
3.8
通讯作者：
Hiroshi Kakuda
中科院分区：
文献类型：
--
作者：
Takatoshi Nakamura;Haruto Hirano;Hiroki Jin;Ryouta Zenpou;Rika Ohtani;Takeshi Kiyokawa;Hiroshi Kakuda
虽然生态系统退化往往是由现有的斜坡植被与商业物种，有限的数据可用于实施实际的方法，自然恢复移植本地物种的植被斜坡。现有植被覆盖的边坡具有生境空间异质性和与现有植被的竞争等特点，这些特点影响着移植的乡土物种的行为。在这项研究中，我们研究了影响百合的生存，生长，轮生，开花ofLilium pendicum，一个本地的沿海草甸物种移植到一个植被公路边坡在北海道，日本。移栽后第4年，成活苗数为364株（占640株移栽苗的57%），转入轮生叶的苗数为181株（占成活苗的50%）。开花植株占存活植株的9%（n = 34）。广义线性模型表明，植株成活率强烈促进较大的鳞茎规模，即养分储备。此外，在植被覆盖度低、易干旱、压力大的生境中，即使是鳞茎鳞片相对较小的幼苗，存活率也大大提高。然而，在高覆盖度的潮湿生境中，无论鳞茎鳞片大小，其存活率都大大降低。生长，轮生，开花促进较高的土壤养分的有效性，如较低的C/N比和较厚的土层。因此，将本地物种移植到植被覆盖的斜坡需要选择具有大量营养储备的耐胁迫物种，并确定移植的最佳生境，即植被覆盖减少的压力环境。
Although ecosystem degradation is often caused by existing slopes vegetated with commercial species, limited data are available for implementing practical approaches for nature restoration by transplanting native species to those vegetated slopes. Existing vegetated slopes are characterized by spatial heterogeneity in the habitat environment and competition with existing vegetation, which affect the behaviors of transplanted native species. In this study, we examined the factors affecting the survival, growth, verticillation, and flowering ofLilium pensylvanicum, a native coastal-meadow species transplanted to a vegetated road slope in Hokkaido, Japan. In the fourth year after transplantation, the number of surviving plantlets was 364 (57% of 640 transplanted plantlets) and the number of plantlets that shifted to verticillate leaves was 181 (50% of the survivors). The flowering plantlets accounted for 9% (n = 34) of the survivors. The generalized linear model showed that plantlet survival is strongly promoted by a larger bulb scale, that is, nutrient reserves. Furthermore, the survival ratio was greatly improved in the drought-prone, stressful habitats with low vegetation coverage, even for plantlets with relatively smaller bulb scales. However, in the moist habitat with high coverage, the survival ratio was greatly decreased regardless of the bulb scale size. Growth, verticillation, and flowering were facilitated by higher soil nutrient availability, such as a lower C/N ratio and thicker soil layer. Therefore, transplanting of native species to vegetated slopes requires the selection of stress-tolerant species with large nutrient reserves and identification of optimal habitats for transplanting, namely stressful environments with reduced vegetation coverage.