Results 211 to 220 of about 164,374 (263)
Advanced Science, EarlyView.Advanced delivery systems—including nanoparticles, nanoemulsions, liposomes, and hydrogels—protect food‐derived bioactive peptides from gastrointestinal degradation and bitterness. These systems enable pH‐responsive release, enhance intestinal absorption, and improve therapeutic efficacy against oxidative stress, metabolic disorders, cancer, and ...
Yu Xu +5 more
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Advanced Science, EarlyView.The concept of high‐dimensional EM modulation using the STMA for physical layer secure communication is illustrated in figure. The STMA consists of a series of programmable unit cells, with 1‐bit reconfigurable phase states (0/π). The STMA is excited by a monochromatic continuous wave (CW) at frequency fc and controlled by a field‐programmable gate ...
Xinyu Fang +6 more
wiley +1 more source
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Ecosystem Function and Ecosystem Management
1997Surely the most sobering, if not daunting, lesson to emerge from millennia of natural resource use and a century of ecological study is that the laws of conservation of mass and energy apply to the ecological systems we depend upon for natural resources and to the environmental conditions that shape the quality of our lives.
Norman L. Christensen, Jerry F. Franklin
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2016
This chapter explores how the mathematical frameworks, empirical methods, and predictions introduced for community structure can be extended to ecosystem function. Also outlined is an alternative conceptual framework (biological stoichiometry) for evaluating eco-evolutionary dynamics at the ecosystem level.
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This chapter explores how the mathematical frameworks, empirical methods, and predictions introduced for community structure can be extended to ecosystem function. Also outlined is an alternative conceptual framework (biological stoichiometry) for evaluating eco-evolutionary dynamics at the ecosystem level.
+4 more sources
Monitoring of the functioning of ecosystems
Environmental Monitoring and Assessment, 1981The theoretical basis, the content and the possible applications of the program 'Monitoring of ecosystems' are considered. A functional definition of ecosystem is proposed, and some features of ecosystems are defined on this basis. The program 'Monitoring of ecosystems' is visualized as a large-scale program of simple measurements of the rates of the ...
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Spatial Pattern of Ecosystem Function and Ecosystem Conservation
Environmental Management, 2003The spatial pattern of ecosystem function can affect ecosystem conservation. Ecosystem functions are often heterogeneous spatially due to physical and biological factors. We can influence ecosystem functions by changing the spatial patterns of the physical and biological elements of an ecosystem and regulating their combinations. The variation-position
Zhongwei, Guo, Yaling, Gan, Yiming, Li
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Biodiversity and ecosystem function in constructed ecosystems.
CABI Reviews, 2008Abstract Constructed ecosystems are engineered to perform functions, such as bioremediation of contaminants, and are increasingly viewed as green alternatives to conventional technologies. Augmenting biodiversity of managed systems such as agroecosystems has been shown to improve yields and other functions such as nutrient uptake, but
M. Ranalli, J. Lundholm
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2019
An important aspect of all aquatic subterranean ecosystems is the nature and connectivity of surface inputs. A theme common to both is heterogeneity of inputs that exist at even the smallest scale. At least in cave streams, carbon appears to be limiting. Studies at the scale of entire caves are of two very different kinds. For caves with surface inputs,
David C. Culver, Tanja Pipan
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An important aspect of all aquatic subterranean ecosystems is the nature and connectivity of surface inputs. A theme common to both is heterogeneity of inputs that exist at even the smallest scale. At least in cave streams, carbon appears to be limiting. Studies at the scale of entire caves are of two very different kinds. For caves with surface inputs,
David C. Culver, Tanja Pipan
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Ecosystem Functions and Ecosystem Values
1997Our understanding of how ecosystems function has expanded enormously since the term was first defined as a dynamical system consisting of a biological entity, typically a regional biota (community), together with its environment by Alfred George Tansley in 1935.
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Phylogenetic diversity and the functioning of ecosystems
Ecology Letters, 2012Abstract Phylogenetic diversity ( PD ) describes the total amount of phylogenetic distance among species in a community. Although there has been substantial research on the factors that determine community PD , exploration of the ...
Diane S, Srivastava +4 more
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