Results 41 to 50 of about 6,811 (176)
Comparative studies on carbon storage and litterfall dynamics between secondary and primary mangrove communities in Zhanjiang,Guangdong Provinces,China [PDF]
, 2014 通过群落调查、异速生长法计算以及样品测定,分别对2010~2011年期间广东湛江高桥红树林生态系统中次生桐花树和原生木榄群落的植物和土壤储量进行了计算,并利用掉落物收集筐对掉落物动态进行了比较研究。研究结果表明,高桥桐花树与木榄群落的植物碳库(以C计,下同)分别为(51.16±12.06)x106g/HM2和(38.52±6.94)x106g/HM2,地上部分明显高于地下部分;土壤碳库分别为(111.86±7.96)x106g/HM2和(106.13±11.12)x106g/HM2,明显高于植物碳库 ...
卢伟志 +5 more
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Functional Ecology, Volume 39, Issue 9, Page 2327-2341, September 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract While elevational patterns of soil bacterial and fungal communities in mountain ecosystems have been well documented, the assembly processes of soil archaeal and protistan communities, and their linkage with ecosystem multifunctionality (EMF), remain poorly understood ...
Bao‐Min Yao +14 more
wiley +1 more source
Shuitu Baochi Xuebao, 2020 以洪涝诱发灾害干扰受损区的次生阔叶林、杉木林和毛竹林为研究对象，研究了3种林型自然恢复过程中土壤容重、孔隙度和田间持水量等11项土壤物理性质指标的变化规律及主要影响因素。结果表明：（1）次生阔叶林和杉木林在未受损—刚受损—受损恢复过程中土壤容重先增大后减小，毛竹林逐渐减小；次生阔叶林和杉木林总孔隙度、含水率、饱和持水量、毛管持水量和田间持水量先减小后增大，毛竹林逐渐减小；3种林型土壤质地先变粗后变细。（2）通过相关性分析和主成分分析，发现含水率 ...
李松阳 +7 more
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GUO Jian-fen1; 2; YANG Yu-sheng2*; CHEN Guang-shui2; LIN Peng1 1 College of Life Science; Xiamen University; Xiamen; P. R. China 2 College of Geography Science; Fujian Normal University; Fuzhou; P. R. China; [PDF]
, 2005 尽管溶解有机碳(DOC)和溶解有机氮(DON)在森林养分循环中的作用日渐为人们所关注,但对它们的浓度及动态,特别是对亚热带森林DOC 和DON 的研究甚少。本文于2002 年通过野外天然降水及亚热带木荷和杉木人工林(monoculture plantations of Schima superba and Cunninghamia lanceolata,15 年生)穿透雨和树干茎流各水样的收集及室内各水样中DOC、NO3 -N、NH4 -N 和总溶解有机氮(TDN)浓度的测- +定,其中DON ...
杨玉盛 +3 more
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Ultrasound in Obstetrics &Gynecology, Volume 66, Issue 1, Page 24-32, July 2025.ABSTRACT Objectives To investigate the impact of aspirin administration on the incidence of preterm birth, according to the type of delivery and gestational age at preterm birth, and to examine the hypothesis that aspirin delays preterm delivery. Methods This was a secondary analysis of a multicenter stepped‐wedge cluster randomized trial of a first ...
H. H. Y. Leung +29 more
wiley +1 more source
Shuitu Baochi Xuebao, 2019 川西亚高山原始针叶林遭受大规模采伐后自然恢复形成的次生林已成为该区域的主要森林类型之一，也是我国西南林区水源涵养林的重要组成部分。现有亚高山森林水源涵养功能研究主要集中在暗针叶林，对天然次生林关注较少。选择川西米亚罗林区亚高山次生林自然恢复演替序列上高山柳灌丛、次生桦木阔叶林、岷江冷杉桦木针阔混交林，以相邻岷江冷杉成熟林为对照，采用空间代替时间的方法，基于土壤容重、孔隙度、持水性能等测定，分析了次生林恢复过程中土壤物理性质变化及土壤水源涵养效应动态，结果表明：（1）次生林恢复过程中 ...
朱万泽, 盛哲良, 舒树淼
doaj
Integrative Conservation, Volume 4, Issue 2, Page 116-119, June 2025.This study provides definitive evidence of wolf presence based on camera trap surveys conducted in Shangri‐La National Park, northwestern Yunnan, between 2022 and 2024. This remarkable rediscovery highlights the critical role that well‐managed national parks can play in facilitating the recovery of endangered species.
Yun Deng +10 more
wiley +1 more source
Shuitu Baochi Xuebao, 2008 研究了自然降雨条件下澄江尖山河小流域4种不同土地利用类型径流小区中面源污染输出特征。结果表明,不同土地利用类型径流小区中面源污染物输出量不同,农地的全磷输出量最大,其次是人工林,次生林和灌草丛较小;氨氮和COD输出量表现出农地和人工林大于次生林和灌草丛。不同土地利用类型径流中面源污染物输出浓度没有显著差异,但从总体上来看,植被覆盖度越高,径流水中的氮、磷浓度越高,而COD、氨氮浓度越低,硝态氮浓度是亚硝态氮浓度的8.5~111倍,可溶态氮以硝态氮形式流失为主;侵蚀泥沙有富集养分的特征 ...
宋泽芬 +3 more
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Patterns of Resource Recycle Utilizing Sewage-soil-plant Systems: Ecological Engineering FLTS for Domestic Sewage [PDF]
, 2004 本文以厦门市狐尾山和仙岳山的原生生活污水林地生态处理系统（FLTS）为例，提出了“氧化塘+污水动力输送、管网投配+林地+再生水回收”的污水－土壤－植物资源再生范式，通过对该系统关键生态过程的研究，解决了FLTS生态工程运行技术参数。FLTS实验林地分为马尾松次生林和人工速生巨尾桉林，林地土壤属南亚热带丘陵台地典型的赤红壤性砂土，机械组成空间差异明显。不同林型比较，短期轮伐集约栽培（SRIC）下巨尾桉速生林平均年生物量积累明显优于次生马尾松林。N、P、K元素年累积量分别较马尾松林高出1.66～3.50倍 ...
胡宏友
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Forest citizens and people‐centered conservation in the Brazilian Amazon
Conservation Biology, Volume 39, Issue 3, June 2025.Abstract Demands for territorial recognition are foundational to the claiming of rights by forest‐proximate people who attempt to conserve their forests. The rights of these often‐marginalized populations have been largely overlooked by conservationists, yet they are central to achieving people‐centered conservation. We further developed the concept of
Luke Parry +9 more
wiley +1 more source