Results 21 to 30 of about 2,615 (138)
牛山湖两种优势小型鱼类空间分布与沉水植被的关系! [PDF]
, 2012 运用8种网目规格的成套浮性刺网作为鱼类采样工具,于2005年夏季在长江中游浅水草型湖泊牛山湖进行鱼类定量采样,通过比较不同茂密程度黄丝草生境中的小型鱼类组成、数量和大小结构,探讨此类湖泊小型鱼类的空间分布特征及其与沉水植被的关系.采样期间共捕获13种1124尾鱼,依据其等级丰度和出现频次,和红鳍原!为该湖优势上层小型鱼类.在调查的沉水植物生物量范围内,鱼类物种丰富度和Shannon多样性指数与沉水植物生物量之间呈现倒抛物线关系;两种优势小型鱼类的种群丰度均与沉水植物生物量有着显著的线性正相关关系 ...
刘家寿 +3 more
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Structured machine learning modeling to support conservation of deep‐sea benthic biodiversity
Conservation Biology, EarlyView.Abstract Biodiversity monitoring programs need to deliver accurate, timely, and actionable predictions. To establish a predictive monitoring program for deep‐sea benthos of the Santos Basin, Brazil, we developed a two‐stage structured model that allowed comparison of biodiversity predictions obtained from environmental simulations (2M‐Sim).
Gustavo Fonseca +23 more
wiley +1 more source
Shuitu Baochi Xuebao, 2007 利用相同区域湖泊沉积物及土壤培养黑藻,分析不同层次底质中各形态磷含量和间隙水中磷浓度的变化,揭示在沉水植物作用下淹水土壤和沉积物中不同层次磷的迁移规律。结果表明,本试验条件下,土壤各层次均比营养水平相当的沉积物中磷的迁移性大,黑藻能促进上层底质中无机磷向上覆水中迁移,通过根系作用促进根尖分布层底质中有机磷的迁移转化;黑藻对沉积物下层(根尖分布层)磷迁移转化的影响小于土壤,对上层底质中磷向上覆水中迁移的影响大于土壤;黑藻通过吸收作用及改变根区环境条件,影响底质间隙水中各形态磷的浓度 ...
赵海超 +4 more
doaj +2 more sources
牛山湖两种不同生境小型鱼类的种类组成、多样性和密度 [PDF]
, 2007 研究了2003年春季浅水草型湖泊牛山湖小型鱼类空间分布(种类组成、多样性和密度等)与生境异质性之间的关系.根据水生植被状况、离岸距离和水深,选择了两种差异较大且有代表性的生境类型,即近岸沉水植物茂密的生境A和远岸沉水植物稀疏的生境B.使用围网(180m2)在这两种生境中进行小型鱼类的采样,采用多次标志回捕法和Zippin去除法估算了围网内小型鱼类的密度.结果表明,两种不同生境中小型鱼类的种类组成、多样性度量值和密度估算值均存在一定程度的差异:1)生境A中的渔获物由5科14种小型鱼类组成 ...
叶少文, 曹文宣, 李钟杰
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九龙江流域河流磷输出对土地利用模式及水文状况的响应 [PDF]
, 2019 本研究应用现场监测、地理信息技术(GIS)、模型模拟和数理统计等方法,基于2015年3月至2017年2月九龙江流域不同主导土地利用类型源头小流域和两条干流河流表层水总磷(TP)、总溶解态磷(TDP)和颗粒态磷(PP)的浓度监测,探究河流磷浓度与输出负荷的时空变化特征,揭示九龙江流域磷输出对土地利用模式及水文状况的响应.结果发现,九龙江流域河流磷浓度和磷输出负荷具有明显的时空变异性.在空间上,农业流域>城市流域>自然流域,西溪>北溪.在季节上,不同类型流域不同形态磷浓度总体表现为春、冬季节较高,而夏 ...
唐莉, 肖才荣, 黄亚玲, 黄金良
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High nitrogen enrichment buffers plant photosynthesis against herbivory damage
Functional Ecology, Volume 40, Issue 1, Page 229-238, January 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Herbivorous insects and nitrogen deposition are key drivers of ecosystem productivity under global change. However, their combined effects on plant photosynthesis, particularly during insect outbreaks, remain poorly understood in natural ecosystems.
Yongqiang Zhang +6 more
wiley +1 more source
, 2012 沉积物疏浚是削减富营养化湖泊内源负荷的最为直接和有效的手段。分析了沉积物疏浚的效果和可能引起的风险;从外源污染、作业区域和深度、沉水植物3个方面探讨了影响沉积物疏浚效果的关键因素。最后指出,富营养化湖泊沉积物疏浚的重要原则是截断外源污染、划分作业区域、合理控制挖掘深度、创造适宜生境、恢复沉水植物 ...
刘华丽 +3 more
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Integrative Conservation, Volume 4, Issue 3, Page 362-380, September 2025.Occurrences of dust storms and long‐distance movement of dust across landscapes is constantly increasing in south Asia. This dust is expected to have profound impact on vegetation health and sustainability as dust may contribute to nutrient budgets of the forest ecosystems, while it could impart various stresses to the plants.
Shree P. Pandey +2 more
wiley +1 more source
, 2005 曹扬环浜是一条环形封闭水道,水质低于地表水V类标准,水体处于严重超富营养化水平,全浜暴发蓝藻水华现象。在采用截污、造流、生态恢复等生态工程措施综合治理后,随着健康水生态系统的建立,河浜水质逐步变好(由劣V类改善为接近Ⅲ类标准),水体透明见底,沉水植物覆盖率达70%~90%,水体一直维持“清水草型稳态”。重点介绍了河道治理中采用的生态修复措施及其作用,并从截污、营养盐、水生生物等方面分析了各项工程措施对抑制藻类生长、水质改善的影响 ...
方涛,王春树,陈洪达,李敦海,刘永定
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New Phytologist, Volume 247, Issue 6, Page 2616-2629, September 2025.Summary Seagrasses are important contributors to environmental nutrient cycling in marine ecosystems and can improve water quality by absorbing excess nitrogen (N). However, these ecosystems are vulnerable to human‐mediated pressures, including marine heatwaves (MHWs), particularly those of longer duration. We performed an experiment simulating a 30‐d,
Alissa V. Bass +5 more
wiley +1 more source