Results 61 to 70 of about 1,117 (160)
The enigmatic life history of the bamboo explained as a strategy to arrest succession
Ecological Monographs, Volume 94, Issue 4, November 2024.Abstract Bamboos are perennial woody grasses that display an enigmatic mix of traits. Bamboo is highly shade intolerant like early‐successional trees. Without secondary xylem, bamboos cannot continue to grow once they reach a maximum height or replace xylem damaged by hydraulic stress and must instead replace each stem after a few years using ...
Aiyu Zheng, Stephen W. Pacala
wiley +1 more source
Shuitu Baochi Xuebao, 2007 采用样方法对辽宁章古台地区樟子松固沙林采伐迹地撂荒后1-5 a内自然恢复植被组成及多样性特征进行了定位研究,结果表明：采伐迹地自然恢复形成的自然植被群落共有49种植物,分属于26个科,以菊科和乔本科植物最为丰富。1a采伐迹地、2a采伐迹地、3a采伐迹地和5a采伐迹地植物群落的Simpson多样性指数分别为0.681,0.792,0.845和0.870,Shannon-Weiner信息统计指数、Pielou均匀度指数的变化趋势和S im pson优势度指数基本相似。植被总生物量由1.351 t/hm ...
吴祥云 +5 more
doaj +2 more sources
西南喀斯特退化天坑负地形倒石坡的土壤微生物分布特征 [PDF]
, 2019 喀斯特退化天坑倒石坡作为一种负地形坡面,在退化天坑植物避难所的物种多样性保护中发挥着重要作用。研究坡面土壤微生物群落功能多样性,有助于阐明土壤微生物群落生态特征和空间分布规律,探索土壤微生物与植物多样性关联,挖掘退化天坑负地形倒石坡的生物多样性宝库价值。研究以云南沾益天坑群中的退化天坑-巴家陷塘为研究对象,运用Biolog微平板技术,分析坡面环境梯度(坑口﹑上坡位﹑中坡位﹑下坡位以及坑底)的土壤微生物群落功能多样性差异。结果显示,坑底土壤微生物群落的功能多样性指数(Shannon指数﹑Simpson指数﹑
江聪 +4 more
core
Insect Conservation and Diversity, Volume 17, Issue 6, Page 1046-1071, November 2024.We quantified previously unstudied tritrophic gall communities on Fagaceae in Sichuan, China, testing for ‘bottom‐up’ effects of host plant diversity on plant–herbivore and plant–parasitoid interactions. We sampled 176 cynipid gall morphotypes from 23 host plant species, yielding 64 parasitoid morphospecies.
Zhiqiang Fang +18 more
wiley +1 more source
Shuitu Baochi Xuebao, 2004 在半干旱地区沙地中，如何使有限的降水被植被利用，植被不发生水分亏缺的情况下，植被密度如何?植被依赖于土壤水分环境的分布格局如何?如何对沙地水资源植被利用的管理等?这些对于沙地生态恢复与重建具有重要的意义。根据沙地灌木林群落土壤水分平衡关系的研究，建立了沙地土壤根际水分消耗模型：AET≡(1-e^-k)Wt或AET≡(1-K1)Wt；提出了灌木林密度计算公式：D≡(1／αc)(∑P／∑AET)^1/2。或D≡(1／αc)(1-β)(∑P／β∑AET-1 ...
王鸣远 杨素堂
doaj +2 more sources
Dutch landscapes have lost insect‐pollinated plants over the past 87 years
Journal of Applied Ecology, Volume 61, Issue 6, Page 1323-1333, June 2024.This study implies that Dutch landscapes are losing insect‐pollinated plant species, which is likely due, at least in part, to the decline in pollination services. Our results of quantifying the decline in insect‐pollinated plants support the necessity and urgency of taking conservation initiatives.
Kaixuan Pan +3 more
wiley +1 more source
浙江大学学报. 农业与生命科学版This study investigated the impact mechanism of rotational grazing on vegetation communities and soil arbuscular mycorrhizal (AM) fungal communities in mixed-sown artificial grassland ecosystems.
WANG Yuan(王媛) +9 more
doaj +1 more source
荒漠草原4种典型草本植物群落土壤水分动态对极端干旱降水的响应
Shuitu Baochi Xuebao, 2023 为明晰荒漠草原典型植物群落土壤水分对极端干旱降水的响应。以4类典型植物群落(蒙古冰草、苦豆子、短花针茅、芨芨草)为研究对象,于2020-2021年分别监测4类植物群落0-120 cm土壤含水量,探讨其土壤水分在消耗期、恢复期和稳定期的动态特征及对降水的响应。结果表明:土壤水分消耗期,土壤含水量为4.56%~7.87%,呈亏缺状态,并且随着极端干旱持续从土壤浅层0-40 cm向深层80-120 cm演变;土壤水分恢复期,较为集中的Ⅴ级降水(单次＞20 mm)能够恢复深层80-120 cm土壤水分 ...
吕浩 +9 more
doaj
Synergistic benefit analysis of carbon sink capacity and biodiversity function of artificial ecosystems in mining reclamation sites [PDF]
Land reclamation in mining areas is an inevitable measure to accelerate the restoration of biodiversity, promote the transformation and development of mining areas, and realize the transformation of carbon sources into carbon sinks. There are few studies
Cong MEN +5 more
core +1 more source
Shuitu Baochi Xuebao, 2008 通过分析传统生态学盖度在指示植被防止水土流失功能的不足,以植被垂直结构中各个层次控制水土流失的机理为依据,提出结构化植被因子指数Cs这一新的指标,建立了植被因子指数模型并进行了案例分析。结果表明:油松和山杨群落中,林冠层、草被层及枯枝落叶层都是植被防止水土流失的关键层次,其盖度对于防止水土流失的作用权重分别为0.0150,0.591,0.394和0.0608,0.828,0.112。结构化植被因子指数考虑了群落结构中各层次的相对作用,并结合各层次的盖度来综合反映植被影响水土流失的作用 ...
雷婉宁, 温仲明
doaj