dataService

您的位置: 首页 > 数据服务 > 数据列表页

筛选

共检索到14条 ,权限内显示50条;

Data from: Epidemiology of Hepatitis E Virus in China: results from the Third National Viral Hepatitis Prevalence Survey, 2005-2006
负责人:
关键词:
HEV hepatitis E virus Seroprevalence Epidemiology Infectious Diseases virology
摘要:
In China, hepatitis E virus (HEV) is prevalent and causes disease, but its epidemiological profile is not well understood. We used a commercial
Data from: Random-close packing limits for monodisperse and polydisperse hard spheres
负责人:
关键词:
摘要:
. Closest jamming densities for monodisperse packings generated with high compression rates using Lubachevsky–Stillinger and force-biased algorithms ar
Data from: Increased novel single nucleotide polymorphisms in weedy rice populations associated with the change of farming styles: Implications in adaptive mutation and evolution
负责人:
Lu, Baorong
关键词:
adaptive evolution environmental change genome sequence human influence novel mutant weed
摘要:
Substantial genetic variation is found in weedy rice (Oryza sativa f. spontanea Roshev.) populations from different rice-planting regions
Data from: Impacts of mixed-grazing on root biomass and belowground net primary production in a temperate desert steppe
负责人:
关键词:
Astragalus galactites Pall.;root turnover;live and dead root;Heteropappus altaicus (Willd.) Novopokr.;Hedysarum brachypterum Bunge;Artemisia frigida Willd;cattle and sheep;Kochia prostrata (L.) Schrad.;Convolvulus ammannii Desr.;Agropyron cristatum (L.) Gaertn.;Potentilla bifurca L.;Cleistogenes songorica (Roshev.) Ohwi;grazing management;Allium mongolicum Turcz. ex Regel;root ingrowth core;Allium tenuissimum L.;Leymus chinensis(Trin.) Tzvel;Medicago ruthenica (L.) Trautv.;Potentilla acaulis L.;Stipa krylovii Roshe
摘要:
The impacts of large herbivores on plant communities differ depending on the plants and the herbivores. Few studies have explored how herbivores influence root biomass. Root growth of vegetation was studied in the field with four treatments: sheep grazing alone (SG), cattle grazing alone (CG), mixed grazing with cattle and sheep (MG) and no grazing (CK). Live and total root biomasses were measured using the root ingrowth core and the drilling core, respectively. After 2 years of grazing, total root biomass showed a decreasing trend while live root biomass increased with time during the growing seasons. Belowground net primary production (BNPP) among the treatments varied from 166±32 to 501±88 g.m-2 and root turnover rates (RTR) varied from 0.25±0.05 to 0.70±0.11 year-1. SG had the greatest BNPP and RTR, while the CG had the smallest BNPP and RTR. BNPP and RTR of the MG treatment were between those of the CG and SG treatments. BNPP and RTR of the CK were similar to MG treatment. Compared with other treatments, CG had a greater impact on dominant tall grasses species in communities. SG could decrease community diversity. MG eliminated the disadvantages of single-species grazing and was beneficial to community diversity and stability.
Data from: Southern Ocean mesopelagic fish comply with Bergmann's rule
负责人:
关键词:
Electrona carlsbergi;Protomyctophum gemmatum;Gymnoscopelus sp.;Electrona antarctica;Gymnoscopelus braueri;Gymnoscopelus nicholsi;Biogeography;Krefftichthys anderssoni;Protomyctophum tenisoni;Protomyctophum choriodon;Gymnoscopelus fraseri;Protomyctophum sp.;Gymnoscopelus opisthopterus;Macroecology;Nannobrachium achirus;Ecology: thermal;Fish;Protomyctophum bolini;Electrona subaspera;Gymnoscopelus piabilis;Protomyctophum andriashevi;Protomyctophum parallelum
摘要:
The applicability of macroecological rules to patterns in body size varies between taxa. One of the most examined is Bergmann's rule, which states that body size increases with decreasing temperature and increasing latitude, although the rule is not universal and the proposed mechanisms underpinning it are multifarious and lack congruence. This study considers the degree to which Bergmann's rule applies to the Southern Ocean mesopelagic fish community. We studied patterns in body size, temperature and latitude across a 12° latitudinal gradient within the Scotia-Weddell sector. Intra-specific Bergmann's rule was found to apply to 8 out of the 11 biomass-dominant species in the family Myctophidae. The rule was also apparent at an inter-specific level. Our study suggests that greater attainable body size in this community is a necessary attribute to reach colder regions further south. The adherence of these taxa to Bergmann's rule enables such species to act as sentinels for identifying the drivers and consequences of ocean warming on the Southern Ocean ecosystem.
Data from: Phylogeny of the Detarioid Genera Cynometra and Maniltoa (Leguminosae)
负责人:
关键词:
Detarioideae;matK;trnL;systematics;Amherstia clade
摘要:
and is nested in a larger clade with the Scorodolphoeus group and the genera Normandiodendron, Neochevalierodendron, and Zenkerella. Futhermore, the genus
Data from: Species delimitation in fungal endophyte diversity studies and its implications in ecological and biogeographic inferences
负责人:
关键词:
barcode of fungi;Species complex;species identification;genealogical sorting index;fungal biodiversity;genetic markers
摘要:
: Hevea brasiliensis and H. guianensis. Molecular tools were used to describe and compare the diversity of the different assemblages. Multi-locus phylogenetic analyses
Data from: Development of G: a test in an amphibious fish
负责人:
Styga, Joseph
关键词:
G-matrix genetic integration ontogeny Kryptolebias
摘要:
. We also test Cheverud’s conjecture by asking whether phenotypic patterns provide an acceptable surrogate for patterns of genetic (co)variation
Data from: Bird responses to lowland rainforest conversion in Sumatran smallholder landscapes, Indonesia
负责人:
关键词:
homegarden;oil palm;jungle rubber;rubber;Agroforest;2013;tropical lowland rainforest;Birds;agroecology
摘要:
s mainly been transformed by smallholders into oil palm (Elaeis guineensis) and rubber (Hevea brasiliensis) monocultures, interspersed with jungle rubber
Data from: Inbreeding intensifies sex- and age-dependent disease in a wild mammal
负责人:
Benton, Clare
关键词:
inbreeding bovine tuberculosis European badger disease progression senescence
摘要:
than mutation accumulation might have increased the magnitude of inbreeding depression in late-life. 5. Whichever mechanism causes the observed patterns

首页上一页12下一页尾页

意 见 箱

匿名:登录

个人用户登录

找回密码

第三方账号登录

忘记密码

个人用户注册

必须为有效邮箱
6~16位数字与字母组合
6~16位数字与字母组合
请输入正确的手机号码

信息补充