نتایج جستجو برای: species composition

تعداد نتایج: 776958  

2018
Naicheng Wu Yueming Qu Björn Guse Kristė Makarevičiūtė Szewing To Tenna Riis Nicola Fohrer

There has been increasing interest in algae-based bioassessment, particularly, trait-based approaches are increasingly suggested. However, the main drivers, especially the contribution of hydrological variables, of species composition, trait composition, and beta diversity of algae communities are less studied. To link species and trait composition to multiple factors (i.e., hydrological variab...

2013
Thijs Christiaan van Son Eivind Oug Rune Halvorsen Fredrik Melsom

The biological reason for a species' presence under given environmental conditions is that the species possesses traits that make establishment and survival, usually also reproduction, possible under these conditions. Biological traits analysis (BTA), when coupled with environmental variables, can provide information regarding which traits are to be expected for a given environmental state. As ...

2004

SLIDE 4 The marsh plain in Californian salt marshes, which extend from Point Concepción near Santa Barbara, down to Baja California, are well suited to the study of species composition and species assemblages and their relationship to ecosystem function because: The herbaceous vegetation is easily sampled. The marsh plain coexists without interference from invasive species. Halophyte traits are...

2013
Andrew Wilby Linda Anderson Anglin Christopher M. Nesbit

The prediction of pest-control functioning by multi-predator communities is hindered by the non-additive nature of species functioning. Such non-additivity, commonly termed an emergent multi-predator effect, is known to be affected by elements of the ecological context, such as the structure and composition of vegetation, in addition to the traits of the predators themselves. Here we report mes...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید باهنر کرمان 1388

copper extraction from heap 3 low grade ore at sarchechmeh is limited due to its mixed composition (copper oxide and sulphide minerals). changing this heap to a bioheap could improve the copper recovery.

Journal: :Ecology letters 2016
Mark C Vanderwel Hongcheng Zeng John P Caspersen Georges Kunstler Jeremy W Lichstein

Ecologists have limited understanding of how geographic variation in forest biomass arises from differences in growth and mortality at continental to global scales. Using forest inventories from across North America, we partitioned continental-scale variation in biomass growth and mortality rates of 49 tree species groups into (1) species-independent spatial effects and (2) inherent differences...

Journal: :journal of agricultural science and technology 0
s. nazemroaya department of fisheries, college of natural resources and marine science, tarbiat modares university, noor, islamic republic of iran. m. a. sahari department of food technology, collage of agriculture, tarbiat modares university, p. o. box: 14115- 336, tehran, islamic republic of iran. m. rezaei department of fisheries, college of natural resources and marine science, tarbiat modares university, noor, islamic republic of iran.

changes in the fatty acid composition and biochemical indices of mackerel (which has a substantial lipid content) and shark (which has negligible lipid content) fillets stored at - 18°c for up to six months were measured. lipid content was measured (6.35% and 1.38%) in mackerel and shark, respectively; however it decreased during frozen storage in both fish species. in analysis of fatty acids t...

Journal: :شیلات 0
ندا سرحدی مربی گروه شیلات، دانشگاه آزاد اسلامی واحد قشم، ایران علی طاهری استادیار گروه شیلات، دانشکدة علوم دریایی، دانشگاه دریانوردی و علوم دریایی چابهار، ایران استادیار گروه زیست فناوری دریایی، مرکز تحقیقات علوم زیستی دریای عمان، دانشگاه دریانوردی و علوم دریایی چابهار، ایران علی معتمدزادگان استادیار گروه علوم و صنایع غذایی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، مازندران، ایران

the aim of this study was to determine the fatty acid and mineral composition in bone of 3 pelagic fish: gold stripe sardine (sardinella gibbosa), anchovy kilka (clupeonella engrauliformis) and indian anchovy (stolephorus indicus). fatty acid profiles showed that total saturated fatty acid have no significant differences in 3 species. the content of total mono saturated fatty acids in anchovy k...

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