Results 31 to 40 of about 8,476 (172)
Diversidad de orquídeas en la isla de Hainan en China: distribución y conservación [PDF]
, 2015 Orchidaceae are widely distributed in many terrestrial ecosystems except for polar and desert areas and constitute a “flagship group” in biological conservation.
He, R. X. +3 more
core +3 more sources
Geographic risks to functional groups of mammals and birds from habitat loss in Mexico
Conservation Biology, EarlyView.Abstract There is a need to quantify the impact of habitat loss due to anthropogenic factors on different aspects of biodiversity, such as functional trait diversity represented by functional groups (FGs). We developed a metric to assess the weighted risk of loss of habitat for 33 FGs of mammals and 36 FGs of birds in Mexico based on potential ...
Fernando Mayani‐Parás +4 more
wiley +1 more source
野生动物学报, 2015 蒙古野驴(Equus hemionus)是国家Ⅰ级保护野生动物,被列入濒危野生动植物种国际贸易公约(CITES)附录Ⅰ中。卡拉麦里山自然保护区是蒙古野驴在我国种群数量最大的分布区,同时蒙古野驴也是卡拉麦里山自然保护区的主要保护动物,其种群数量和分布的变动反映着当地生态环境的变化。近年来,准东煤电煤化工产业开发在促进当地经济社会发展的同时,也给卡拉麦里山的野生动物带来了不利影响。通过路线调查和文献资料统计,比较了蒙古野驴种群数量及分布情况的历史变化,分析了卡拉麦里山蒙古野驴的栖息地现状 ...
彭向前
doaj
Geographical Variation in Vegetative Growth and Sexual Reproduction of the Invasive Spartina alterniflora [PDF]
, 2015 生物入侵是全球变化的重要内容，对全球经济和环境产生严重影响，并威胁生态系统的多样性。明确生物入侵发生的过程和机制可以有效地防控入侵生物带来的危害。繁殖是入侵种从定居到其后扩张过程中的一个重要的内在因素，进而可能影响入侵的成功。在入侵种扩散并占据广阔的地理分布区过程中，表型可塑性可能起到关键作用。揭示入侵种繁殖和表型可塑性在变异及其与环境因子的相关关系，对阐明外来物种的入侵机制和预测其分布具有重要的意义。互花米草原产美国大西洋沿岸和墨西哥湾，于1979年从美国引入中国。经过30多年的入侵和扩散 ...
刘文文
core
Conservation Biology, EarlyView.Abstract Human development is a driver of global change and a major threat to biodiversity. Protected areas maintain and support biodiversity, but outside stressors, such as climate change and land use change, can negatively influence natural resources within protected areas.
Leah J. Rudge +2 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2003 通过群落与种群的调查,对浙江北部几个地区的青冈常绿阔叶林中青冈种群的数量特征,从分株和分株+萌生枝两个层次上进行了研究.结果表明:青冈种群的大小结构在分株层次上,有两种类型:纺锤形结构和不典型的金字塔形结构(倒"J"型),在分株+萌生枝层次上,都为金字塔形结构;青冈种群主要是集群分布格局;动态分布格局是从集群分布到随机分布.
HUXiao-bing(胡小兵) +1 more
doaj +1 more source
Response of phytoplankton to nutrients addition in the upwelling regions of the Taiwan Strait [PDF]
, 2008 2006年6月在台湾海峡近岸上升流区通过表层水体营养盐添加的现场培养实验,研究该海区营养盐限制情况及其浮游植物水华产生的主要影响因素。对营养盐,叶绿素a浓度和浮游植物细胞丰度进行了测定,结果表明,实验中不存在明显的硅限制;氮磷营养盐均存在明显的限制,且氮限制情况更为严重。营养盐添加后,冰河拟星杆藻(Asterionellopsis glacialis)等硅藻迅速生长成为优势藻种,其对氮磷的利用机制有所不同。对氮营养盐采取吸收后迅速同化利用,相较于硝酸盐的补充,氨氮补充条件下优势硅藻更易迅速生长并迅速死亡;
张钒 +4 more
core
Biodiversity‐driven spatial conservation planning to delineate temporally stable regions
Conservation Biology, EarlyView.Abstract The accelerating loss of biodiversity underscores the critical need for effective conservation strategies, particularly in the face of climate change and anthropogenic pressures. We devised a conservation planning framework that adopts a temporal stacking approach to species distribution models and landscape connectivity analyses. These models
Mattia Iannella +5 more
wiley +1 more source
The population dynamics and parameter of growth and mortality of Sillago sihama in the Minnan-Taiwan fishing grounds [PDF]
, 2008 以2001~2003年在闽南-台湾浅滩渔场底拖网渔获物采集的多鳞鱚样品,进行渔获群体结构和生长与死亡的研究,并从生态学参数的变化探讨种群动态。结果表明,多鳞鱚渔获群体叉长范围65~237mm,优势组131~150mm,平均134.5mm,体重范围5~110g,优势组11~30g,平均26.1g。年龄范围0~3龄,优势组1龄,平均0.91龄。生长参数L∞为260.89mm、W∞为153.81g、k为0.6614、t0为-0.6158、tr为0.8474龄。Z为2.7728,M为1.3004,F为1 ...
卢振彬, 杜建国, 陈骁
core
Scenarios and strategies for future‐proofing ecosystem management under climatic novelty
Conservation Biology, EarlyView.Abstract Climate change is driving unprecedented declines in dominant, habitat‐forming foundation species across marine and terrestrial ecosystems globally. As climatic novelty becomes the norm, ecosystem reassembly will become increasingly common. Predicting and understanding these transitions, and their implications for future ecosystem functioning ...
Lauren T. Toth +14 more
wiley +1 more source