Results 51 to 60 of about 1,046,914 (211)

果园生态系统生产力调控

open access: yes, 2009
以黄土沟壑区果园生态系统为研究对象,针对黄土高原果业生产波动性大,生态系统恶化等问题,通过调控果树的生殖生长量,研究了果园生态系统生产力调控及系统响应。结果表明:生产力水平高的处理对土壤深层的水分利用增强,但降低了土壤深层贮水量,从而进一步加重土壤干燥化程度;以生殖生长调控为手段的生产力调控能够显著改善果实的单果重、果实硬度、着色指数等外在品质,果品优果率可提高12.9%~23.5%;通过生产力调控,果业生产经济效益显著提高,果园生态系统健康状况得到维持,果树生产波动性缓解。确定挂果2.25×
鞠艳   +4 more
core  

Providing regular and frequent maps of losses and gains of farmland birds based on European monitoring data

open access: yesConservation Biology, EarlyView.
Abstract Knowledge of species distributions is essential for informing policies on nature conservation and restoration. However, updating them on a regular basis and doing so in a harmonized manner at the international level is difficult. The European Bird Census Council integrated national monitoring data covering 5 years to update farmland bird ...
Sergi Herrando   +54 more
wiley   +1 more source

生态效益及其特性

open access: yes, 2019
生态效益从1980年代提出以来,在我国得到了广泛的应用。但到了1990年代,随着外来词—生态系统服务(功能)的引进,生态效益在生态学界的使用不像从前普遍。将探讨生态效益的定义、与生态系统服务的关系、形成机制和主要特征,为国家将落实生态效益纳入到社会经济发展评价指标体系提供理论基础。将生态效益定义为生态系统及其变化引起的人类生存和社会经济发展条件的改善程度,并指出了生态效益形成机制及其特性的范围,其中机制包括:生态系统功能发挥机制、生态系统内部稳定机制以及人与自然耦合机制;生态效益特性包括:生态系统介导性、
薄乖民   +10 more
core  

Centering geospatial data uncertainty and the potential for injustice in pastoralist rangeland conservation prioritization

open access: yesConservation Biology, EarlyView.
Abstract Procedural, distributional, recognitional, and epistemic justice aspects of conservation interventions are well documented in contexts where pastoralism is a key livelihood and way of life. Geospatial analyses and representations of wildlife conservation and restoration that are increasingly applied in pastoralist rangeland socioecological ...
Ryan R. Unks
wiley   +1 more source

基于3S技术的塔里木河中下游生态环境动态监测系统研究

open access: yes, 2001
本文主要研究基于3S技术的塔里木河中下游生态环境动态监测系统。本文在论述了3S技术的基本概念、理论和技术体系的基础上,详细讨论了综合运用RS、GIS和GPS技术进行生态环境动态监测研究的技术路线和方法,并总结出塔河流域中下游地区从1990年到2000年十年间的生态环境动态变化趋势。本论文共包括7个部分,第一部分是引言;第二部分主要论述了3S技术的基本概念及理论体系;第三部分详细叙述了塔里木河中下游的基本概况;第四部分详细阐述了运用3S技术进行塔里木河中下游生态环境动态变化研究的具体技术路线及方法 ...
刘志丽 
core  

Emerging applications of large language models in ecology and conservation science

open access: yesConservation Biology, EarlyView.
Abstract Large language models (LLMs) mark a major development in artificial intelligence, with potentially transformative implications for ecology and conservation science. Built on advanced deep‐learning architectures, these models can support a wide range of tasks. We reviewed emerging applications of LLMs, drawing on the wider scientific literature
Christos Mammides   +5 more
wiley   +1 more source

横断山区干旱河谷生态恢复的理论认识与实践(中国当代生态学研究:生态系统恢复卷)

open access: yes, 2013
由于人为或者自然因素造成的生态系统生物生产力的下降、结构的简单化以及功能的丧失,已成为制约中国社会经济可持续发展的瓶颈之一。当前,恢复生态学成为当代生态学研究的热点问题之一。为系统总结近二十年来中国在退化生态系统恢复方面开展的理论与应用研究成果,为生态学研究和生态保护实践提供借鉴,本书组织国内知名的生态学家,群策群力,合作编著。内容涵盖了不同类型的生态系统恢复、典型地区的生态系统恢复 ...
李芳兰, 丁建林, 包维楷
core  

Insights for conservation from the Ecological Knowledge Games project

open access: yesConservation Biology, EarlyView.
Abstract Environmental conservation research requires robust methods for collecting large‐scale behavioral data and engaging diverse stakeholders in decision‐making processes. We (Y.P., A.B.D., and N.B.) created EcoKnowGames (Ecological Knowledge Games), a transdisciplinary project that develops knowledge games for conservation science and data ...
Yuan Pan   +4 more
wiley   +1 more source

干旱区城市生态安全评价及其预警分析——以乌鲁木齐市为例

open access: yes, 2006
生态安全是国家安全体系中的重要环节之一,城市的生态安全则是一个国家或区域生态安全的基础和核心。本文围绕西部干旱区城市脆弱生态环境等相关问题,结合城市生态学、景观生态学、自然地理学、环境科学等学科的相关理论和研究方法,以及遥感和GIS技术,以乌鲁木齐为研究区进行生态安全评价和预警研究。 空间尺度上,从生态敏感性的角度研究了干旱区城市生态敏感性空间分异特征,并提出相应的缓解措施,为下一步生态安全研究提供了理论支撑。 时间尺度上,利用研究区1989年美国陆地卫星Landsat ...
李凤英
core  

Habitat and spatial trends of U.K. wintering waterbird populations over 50 years

open access: yesConservation Biology, EarlyView.
Abstract The United Kingdom is an important wintering ground for millions of waterbirds. Most U.K. wintering waterbird populations increased between 1970 and the mid‐1990s, but declined thereafter. We examined U.K. population indices in 46 wintering waterbird species in two 25‐year periods, 1970–1994 and 1995–2019, to identify which waterbird groups ...
Blaise Martay   +8 more
wiley   +1 more source

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