Results 21 to 30 of about 791 (115)
Amazonian conservation across archipelagos of Indigenous territories
Abstract Indigenous stewardship is essential to the conservation of biocultural diversity, yet conventional conservation models often treat Indigenous territories (ITs) as homogeneous or isolated units. We propose that archipelagos of Indigenous territories (AITs), clusters of ITs that span geographies but are connected through shared cultural or ...
Michael S. Esbach +3 more
wiley +1 more source
杉木林是我国南方地区的主要造林树种,研究不同更新方式的杉木林固碳及水土保持功能对科学评价森林生态系统的生态服务功能具有重要意义。以赣西南杉木实生林和萌芽林为研究对象,通过野外样地调查和室内化学分析方法,揭示了不同龄组实生林和萌芽林的碳储量分配特征,为其可持续经营提供科学依据。结果表明:不同龄组杉木实生林乔木层碳储量均高于萌芽林乔木层碳储量。杉木实生幼龄林乔木层碳储量为9.63 t/hm2,中龄林为42.14 t/hm2,近熟林为69.15 t/hm2,成熟林为105.21 t/hm2;年均固碳量分别为1.
唐学君, 王伟峰
doaj
The need for carbon finance schemes to tackle overexploitation of tropical forest wildlife
Abstract Defaunation of tropical forests, particularly from unsustainable hunting, has diminished populations of key seed dispersers for many tree species, driving shifts in forest community composition toward small‐fruited or wind‐dispersed trees with low wood density. Such shifts can reduce aboveground biomass, prompting calls for overexploitation to
Caroline E. Milson +3 more
wiley +1 more source
为了更好地理解土壤碳氮元素对氮添加的响应,通过短期原位模拟氮沉降试验,揭示黄土高原子午岭人工油松(Pinus tabulaeformis Carrière)林土壤碳氮对外源氮添加的响应过程和机制。从2015—2016年设置4个氮添加水平,分别为对照(0 kg/(hm2·a),N0)、低氮(50 kg/(hm2·a),N50)、中氮(100 kg/(hm2·a),N100)和高氮(200 kg/(hm2·a),N200),研究人工油松林地不同深度土层土壤有机碳和全氮以及土壤碳氮储量对模拟氮添加的响应 ...
陈磊 +4 more
doaj
Graphical abstract AbstractThe highly reversible insertion/extraction of large‐radius K+ into electrode materials remains a tough goal, especially for conversion‐type materials. Herein, we design a current collector‐integrated electrode (N–CoSe/CoSe2–C@Cu) as an advanced anode for potassium‐ion battery (PIBs).
Zi‐Jie Mu +9 more
wiley +1 more source
The use of biochar increased greenhouse gas (GHG) emissions but countered the harm caused by GHG emissions by considerable soil carbon sequestration resulting in a negative carbon footprint. Furthermore, the use of biochar lowered the proportion of CH4 and N2O, demonstrating that biochar usage has a considerable positive effect on GHG emissions ...
Zhuoxi Chen +4 more
wiley +1 more source
利用合肥市第7次森林资源清查资料,对各县(区)森林面积、生物量及其年龄结构进行统计,依据建立的不同森林类型生物量和蓄积量之间的回归方程,估算全市森林蓄积量,并根据含碳率推算森林碳储量和碳密度。结果表明:全市森林多集中在三县,以中幼林为主,森林总面积为47 983.4 hm2,蓄积量为523 239 m3,生物量为231 260.87 t,碳储量为115 630.43 t,碳密度为2.41 t/hm2;以杨类的面积最大,马尾松的生物量、蓄积量和碳储量最大;森林面积以幼龄林最大,随年龄增加而减少 ...
刘西军, 徐小牛, 洪安东
doaj
采用野外调查与室内分析相结合的方法,研究石羊河流域民勤干旱沙区种植人工梭梭林4,13,36年后的土壤有机碳(Soil organic carbon,SOC)、无机碳(Soil inorganic carbon,SIC)、全氮(Total nitrogen,TN)和总碳(soil total carbon,TC)含量及储量变化特征。结果表明:流动沙地种植梭梭后,0-50 cm层灌丛下和行间SOC和TN含量总体随造林年限增加而增加,5-50 cm层灌丛下SIC含量在13年梭梭林地最高。36,13年林地0 ...
尚雯 +8 more
doaj
为阐明开垦年限对土壤理化性质及无机碳的影响,进一步了解干旱区土地开垦进程中的土壤质量变化规律和碳吸收与存储过程,以开垦年限分明的典型区—新疆三工河流域阜北农场为研究区,调查、分析了不同开垦年限(已开垦0,1,3,5,15,30,50 a)剖面土壤的pH值、盐分、无机碳含量与储量的分布特征、变化规律及开垦年限对它们的影响。结果表明:(1)已开垦土地的土壤pH值随土层深度的增加而升高;随开垦年限的延长,0—60 cm(耕作层)的土壤pH值显著降低(P<0.05),60—140,140—200 ...
邓彩云, 王玉刚, 李
doaj
基于5年的田间小区定位试验,采用干筛法对不同施氮水平下的玉米单作、马铃薯单作和玉米马铃薯间作土壤进行团聚体分级并测定各粒级团聚体有机碳含量,研究间作对土壤团聚体有机碳储量的影响及其氮调控效应。结果表明:92%以上的土壤有机碳储藏在土壤大颗粒团聚体(>2 mm)和小颗粒团聚体(2~0.25 mm)中。间作提高了土壤大颗粒团聚体(>2 mm)和小颗粒团聚体(2~0.25 mm)的比例,但对不同粒级团聚体有机碳含量的影响与施氮量相关。对比2种单作,间作在低氮(N1)和常规施氮(N2)下增加了土壤总有机碳储量 ...
向蕊 +6 more
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