Results 41 to 50 of about 5,829 (160)

Patterns of Resource Recycle Utilizing Sewage-soil-plant Systems: Ecological Engineering FLTS for Domestic Sewage [PDF]

open access: yes, 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
core  

喀斯特原生天坑植物群落空间格局特征——以云南沾益天坑为例 [PDF]

open access: yes, 2018
以云南沾益大毛寺原生天坑为例,获取坑内植物群落林木个体相对位置信息,进行角尺度、混交度、林层指数等林木空间结构参数与坑底植物群落空间格局分析,并运用点格局分析方法进行单个种群的空间分布特征以及不同种群间的空间关联性分析.结果表明:大毛寺原生天坑坑底植物群落在空间分布上呈现随机分布,林木物种呈中度混交,林木垂直分层虽较简单,但结构稳定,具有发育成熟的顶极森林群落的空间分布特征;坑底植物群落的种群主要呈聚集分布,种群间呈负关联,且处于同一垂直层次上种群间空间负相关性更强,垂直层次相差越大,空间竞争性越小 ...
江聪   +5 more
core   +1 more source

Plant–microbe interactions drive the rhizosphere microbial assembly and nitrogen cycling in a subtropical forest

open access: yesFunctional Ecology, Volume 39, Issue 5, Page 1274-1287, May 2025.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Interactions between plants and soil microorganisms in the rhizosphere are vital for maintaining the nutrient cycle and stability of terrestrial ecosystems. Nitrogen, closely related to carbon (C) cycling and ecosystem productivity, undergoes transformation by soil ...
Ru Wang   +9 more
wiley   +1 more source

川西亚高山次生林恢复过程中土壤物理性质及水源涵养效应

open access: yesShuitu 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  

Process of Patch Mosaics of Mature Subtropical Monsoon Evergreen Broadleaved Forest in Hexi, Fujian, China [PDF]

open access: yes, 2009
群落演替作为植被动态研究的核心内容,是植被生态学研究的热点问题之一。同时季风常绿阔叶林作为南亚热带地区的地带性植被,是南亚热带陆地生态系统的重要组成部分。本研究运用植物群落学和恢复生态学的原理,同时采用时空互代的方法,调查了具有代表性的南亚热带季风常绿阔叶林——福建南靖和溪南亚热带季风常绿阔叶林(南亚热带雨林)。系统地分析了其斑块的组成、生长型、生活型、结构、物种多样性、斑块相似性等,同时还探讨了整个演替系列斑块的恢复潜力及其演替机制。研究结果表明: 1.在林窗形成后的2~30a间 ...
林媚媚
core  

Three‐dimensional conservation planning of fish biodiversity metrics to achieve the deep‐sea 30×30 conservation target

open access: yesConservation Biology, Volume 39, Issue 2, April 2025.
Abstract Accelerating rate of human impact and environmental change severely affects marine biodiversity and increases the urgency to implement the Convention on Biological Diversity (CBD) 30×30 plan for conserving 30% of sea areas by 2030. However, area‐based conservation targets are complex to identify in a 3‐dimensional (3D) ocean where deep‐sea ...
Laetitia Mathon   +19 more
wiley   +1 more source

Big Cat Mortality in Subsistence Hunts in Amazonia 亚马孙雨林地区生计狩猎中的大型猫科动物致死情况研究

open access: yesWildlife Letters, Volume 3, Issue 1, Page 16-21, March 2025.
We use data from a participatory biodiversity monitoring program to estimate the annual mortality of jaguars and pumas resulting from subsistence hunts in two Amazonian Extractive Reserves. We estimate that around 50 big cats are killed annually in the study area, which is consistent with an independent estimate for the same area and within the same ...
Elildo A. R. Carvalho Jr.   +3 more
wiley   +1 more source

澄江尖山河小流域不同土地利用类型面源污染输出特征

open access: yesShuitu 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
doaj  

Landscape‐scale predictions of future grassland conversion to cropland or development

open access: yesConservation Biology, Volume 39, Issue 1, February 2025.
Abstract Grassland conservation planning often focuses on high‐risk landscapes, but many grassland conversion models are not designed to optimize conservation planning because they lack multidimensional risk assessments and are misaligned with ecological and conservation delivery scales.
Kevin W. Barnes   +2 more
wiley   +1 more source

辽东山区天然次生林和落叶松人工林的土壤呼吸

open access: yesShuitu Baochi Xuebao, 2011
在2008-2009年生长季,利用Licor-8100对辽东山区天然次生林和落叶松人工林的土壤呼吸速率及其主要影响因子进行了测定。结果表明:辽东山区2种森林类型的土壤呼吸速率日变化均呈单峰型曲线;土壤呼吸速率与林地10cm的土壤温度相关性最好,相关关系分别为y=0.3614e0.1219x(R2=0.702 0 ...
张慧东   +5 more
doaj  

Home - About - Disclaimer - Privacy