Results 21 to 30 of about 1,303 (185)
Response of Microbial Community Structure and Diversity to Nitrogen Deposition in Soils of Pinus yunnanensis Forest of the Central Yunnan Plateau [PDF]
[Objective] To study the characteristics of changes in chemical properties and diversity and structural composition of soil microbial communities in Pinus yun-nanensis soils on the Central Yunnan Plateau under nitrogen deposition, and to analyze the ...
DENG Qiujiang +6 more
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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
Greenhouse gas emissions from croplands of China [PDF]
, 2003 China possesses cropland of 1.33 million km 2. Cultivation of the cropland not only altered the biogeochemical cycles of carbon (C) and nitrogen (N) in the agroecosystems but also affected global climate.
Bohan, Liao +13 more
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Functional Ecology, Volume 39, Issue 12, Page 3504-3516, December 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract Nitrogen (N) deposition strongly affects litter decomposition and nutrient release, thereby reshaping carbon cycling in terrestrial ecosystems. Although most studies have focused on above‐ground litter, the effects of N addition on fine root decomposition and their ...
Yuneng Wang +5 more
wiley +1 more source
Shuitu Baochi Xuebao, 2022 为探究荒漠草原土壤微生物特征对短期氮添加的响应,以宁夏荒漠草原为对象,参照国内外同类研究和当地的氮沉降量,设置N0、N1、N2、N3、N4的5个处理,其纯氮添加量分别为0,2.5,5,10,15 g/(m2·a),以尿素为氮源进行为期2年的氮添加试验,对不同氮添加处理下荒漠草原浅层土壤微生物特征进行了研究。结果表明:(1)随氮添加量的增加,荒漠草原0—20 cm土层土壤铵态氮含量呈升高的变化趋势,硝态氮含量呈先升高后下降的变化趋势。在0—10 cm土层,N1、N2、N3 ...
宋珂辰 +5 more
doaj
Nitrate isotope constraint on N dynamics in the upper water column and water masses exchange in the intermediate and deep waters of the South China Sea [PDF]
, 2016 氮是组成生命的重要元素。生物可利用氮限制了大部分海区的表层海洋生物生产力，成为调节全球气候的一个重要因子。几乎所有氮形态的转变，都有生物过程参与其中，显著影响着其他元素的循环过程，特别是碳和磷等，因此，氮循环在生物地球化学循环中扮演着重要的作用。此外，自工业革命以来人为活动对氮循环的影响日益加剧，至今人为活动向大洋排放的氮通量与生物固氮作用相当，因而受人为活动影响的氮循环过程也成为全球研究的热点。 边缘海作为连接大陆和大洋的媒介，受人为活动的影响相对开阔大洋更为强烈，是氮循环过程比较活跃的区域 ...
吴乔
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Shuitu Baochi Xuebao, 2022 为探究在全球气候变化敏感区的干旱区高寒湿地上,氮添加对土壤无机磷形态的影响。在保护良好的巴音布鲁克高寒湿地沼泽(S)、沼泽草甸(SM)和草甸(M)布设野外原位试验,依据巴音布鲁克草原氮沉降量,设置0(CK),8(N1),16(N2) kg·N/(hm2·a)的施氮量,研究短期氮添加对高寒湿地土壤无机磷形态的影响。结果表明:(1)高寒湿地土壤全磷含量平均为1.09 g/kg,总无机磷平均为492.71 mg/kg,而总无机磷平均占全磷的45.67%。(2)3种湿地类型土壤无机磷主要以Ca—P形态存在 ...
胡洋 +7 more
doaj
Nitrogen cycle in the northern South China Sea: insights from stable N isotopic composition [PDF]
, 2015 氮是海洋初级生产力的主要限制因素之一,进而影响有机物输出,因而调控海洋生物泵效率和大气二氧化碳水平。因此,海洋氮循环过程与碳、磷等其它生源要素的循环紧密联系,在海洋生物地球化学循环过程中扮演极其重要的角色。另一方面,自工业革命以来人为活动对海洋氮循环的影响日益增长,至今人类活动向海洋排放的氮通量已与海洋生物固氮作用的通量相似。因而,海洋氮循环将如何响应人类活动对其的胁迫已成为海洋生物地球化学研究的热点问题。 陆架边缘海连接陆地和开阔大洋,是氮循环过程极其活跃,也是最为复杂的区域 ...
杨进宇
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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
Carbon cycling of forest ecosystems in response to global nitrogen deposition: a review [PDF]
, 2007 森林土壤和植被储存着全球陆地生态系统大约46%的碳,在全球碳平衡中起着非常重要的作用。过去几十年来,森林生态系统的碳循环和碳吸存受到了全球氮沉降的深刻影响,因为氮沉降改变了陆地生态系统的生产力和生物量积累。以欧洲和北美温带森林区域开展的研究为基础,综述了氮沉降对植物光合作用、土壤呼吸、土壤DOM及林木生长的影响特征和机理,探讨了森林生态系统碳动态对氮沉降响应的不确定性因素。热带森林C、N循环与大部分温带森林不同,人为输入的氮对热带生态系统过程的影响也可能不同 ...
李燕燕 +5 more
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