Results 31 to 40 of about 30,335 (182)
Haiyang yu huzhao赤潮暴发不仅会导致水体中积聚过量微藻细胞，还常常伴随出现氮磷等富营养化污染因子超标的问题。随着生态环境治理要求的提升，有害赤潮治理不仅需要高效除藻来控制灾害，还需要同时净化水体中的其他污染物质，对受污染水环境进行综合治理。该研究面向有害赤潮综合治理需求，以现有改性粘土法为基础，探究了在粘土中引入尿素合铁材料制备功能性赤潮治理材料的方法可行性，实验测试了新制备尿素合铁改性粘土(ferric carbamide complex-modified clay, FMC)的除藻降磷效果 ...
张 博闻 +4 more
doaj +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2013 通过盆栽模拟酸雨喷淋实验，比较了不同酸雨酸度（pH值分别为2.5、3.5、4.5和5.6(CK))下，乌药(Lindera aggregata)幼苗光合作用、叶绿素荧光、膜脂过氧化以及抗氧化酶活性的差异，探讨酸雨胁迫对乌药幼苗生理生态特性的影响.结果表明：夏季，不同酸雨酸度处理下，净光合速率日变化均呈单峰曲线，日均净光合速率随着酸雨酸度的升高而降低.随酸雨酸度的升高，乌药幼苗的最大净光合速率、相对叶绿素含量均显著降低，且pH 2.5处理的影响更为显著.酸雨处理降低了乌药的光饱和点(LSP)，而pH 2 ...
WANGQiang(王强) +2 more
doaj +1 more source
Wildlife Letters, EarlyView.Reported annual per‐capita harvest of muskrats (PCHM) decreased as wetland complexity (total number of wetland patches) decreased in 13 state and federal wetland areas in the Midwest, USA. Our results support the hypothesis that regional‐scale declines in the abundance of muskrats are likely associated with the losses to wetland habitats throughout the
Tim L. Hiller +5 more
wiley +1 more source
Haiyang yu huzhao安氏新银鱼是我国重要的小型经济鱼类物种，具有较高的经济价值。但目前缺乏一种快速、经济有效的性别鉴定方法，极大地阻碍了其性别决定分子机制、性染色体演化历程的研究和水产育种与养殖技术方面的生产实践。本研究通过比较安氏新银鱼雌性与雄性的全基因组重测序数据，发现雌雄之间存在一个显著差异的基因组区域(chr02: 2 798 574~5 434 239 bp)。基于测序深度差异分析筛选得到3个雌性特异性片段，长度分别为10 bp、167 bp和53 bp。在长为167 bp的雌性特异性位点附近设计引物 ...
王 心悦 +4 more
doaj +1 more source
Wildlife Letters, EarlyView.We used automated behavioral response systems (ABRs) to assess invasive wild pig (Sus scrofa) behavioral response to four auditory playbacks: humans, coyote vocalizations (Canis latrans), pigs in distress, and barred owl (Strix varia) calls. Wild pigs had a significant flight response to human playbacks, but 68% of pigs did not flee.
Justine L. Smith +2 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2019 根据韭山列岛海域2015 年11 月（秋）、2016 年2 月（冬）、5 月（春）、8 月（夏） 的调查资料，运用相对重要性指数（index of relative importance，IRI）、冗余分析（redundancy analysis，RDA）、数量生物量曲线 （Abundance-biomass comparison curve，简称ABC 曲线） 及W 统计量（W-statistics） 等方法，分析了该海域优势种虾类及其与环境因子的关系。结果表明，保护区共调查到暖温、暖水性虾类16 种，
LUKaner(卢衎尔) +6 more
doaj +1 more source
Wildlife Letters, EarlyView.The study explores how beavers (Castor spp.) affect endangered freshwater pearl mussels (Margaritifera margaritifera) in European rivers. Beaver dams can harm small, fragmented mussel populations by reducing flow, increasing sediment, and potentially limiting host fish movement, while larger populations may benefit from improved bed stability and ...
Louise Lavictoire +2 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2013 采用LI-6400便携式光合作用系统，于2011年7月下旬的晴朗天气条件下，对浙江省天台山林窗、林缘、林下生境华东野核桃(Juglans cathayensis var. formosana)的光合生理特性及叶绿素荧光参数进行测定，并比较林窗生境中华东野核桃与其伴生植物山胡椒（Lindera glauca ）、玉兰(Magnolia denudata)、云锦杜鹃(Rhododendron fortunei）光合日进程的差异.结果表明：夏季，林窗生境的华东野核桃及主要伴生植物叶片的净光合速率(Pn ...
LIYue-ling(李月灵) +3 more
doaj +1 more source
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Decomposition is the transformation of dead organic matter into its inorganic constituents. In most biomes, decomposition rates can be accurately predicted with simple mathematical models, but these models have long under‐predicted decomposition in globally extensive ...
Heather L. Throop +8 more
wiley +1 more source
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Drylands are mainly structured by both vascular plants and biological soil crusts (biocrusts), the latter often regarded as a self‐organizing component of these ecosystems.
Haoran Luo +13 more
wiley +1 more source