Author: P. Trojan
Publisher: Springer Science & Business Media
ISBN: 9789061936220
Category : Science
Languages : en
Pages : 148

Get Book Here

Book Description

Author: Christopher J. Paradise
Publisher: Momentum Press
ISBN: 1606509543
Category : Science
Languages : en
Pages : 66

Get Book Here

Book Description
Individual organisms contribute to nutrient cycling in ecological systems, which is shown to be a mechanism of homeostasis at that level. The phosphorus and nitrogen cycles are used to illustrate effects of changes in populations or communities on the cycling of these nutrients. Major disturbances such as deforestation and global climate change disrupt nutrient cycles and ecological system homeostasis. Data are examined to determine effects of deforestation on nutrient cycling. Increasing atmospheric carbon dioxide and global climate change are disrupting ecological systems’ homeostasis, and several studies are used to show how this is happening, including changes in primary production, temperature and precipitation patterns. This book also discusses the role of individual species in filtering contaminants and pollutants from ecological systems.

Author: Przemysław Trojan
Publisher:
ISBN: 9788301050054
Category :
Languages : en
Pages : 132

Get Book Here

Book Description

Author: Christopher J. Paradise
Publisher: Momentum Press
ISBN: 1606509748
Category : Science
Languages : en
Pages : 44

Get Book Here

Book Description
Organisms maintain homeostasis in a variety of ways. In the first part of this book, mammals are shown to regulate their body temperatures through homeostatic mechanisms. The data from thermoregulation experiments that demonstrated the role of neurons in body temperature homeostasis are examined. The second part of this book discusses how organisms allocate the limited energy that is available to them for survival, growth, or reproduction. Excess energy in individuals can translate to growth of populations: if enough remains after survival and growth, it can be allocated to reproduction. However, even closely related organisms may have different strategies for allocating resources that are dependent upon the environmental conditions in which they exist.

Author: Patrick Kangas
Publisher: CRC Press
ISBN: 0203486544
Category : Nature
Languages : en
Pages : 469

Get Book Here

Book Description
Less expensive and more environmentally appropriate than conventional engineering approaches, constructed ecosystems are a promising technology for environmental problem solving. Undergraduates, graduate students, and working professionals need an introductory text that details the biology and ecology of this rapidly developing discipline, known as

Author: M. P. Sinha
Publisher: APH Publishing
ISBN: 9788170248422
Category : Ecology
Languages : en
Pages : 634

Get Book Here

Book Description
Contributed articles with reference to India; commemoration volume for Prof. P.N. Mehrotra.

Author: Tommie Forslund
Publisher: John Wiley & Sons
ISBN: 1119657903
Category : Psychology
Languages : en
Pages : 288

Get Book Here

Book Description
As interest in attachment theory continues to grow, misconceptions of the theory are becoming increasingly common. Important texts on major theoretical and empirical contributions are often too extensive for non-specialist readers or not readily available to clinicians. Designed to address a significant gap in literature, Attachment Theory and Research: A Readerpresents a carefully curated selection of book chapters and journal articles on the subject—complemented by previously unpublished material by the founder of the theory. This valuable new resource provides practitioners, students, policymakers, and general readers an accessible and up-to-date view of the concepts, development, and diversity of attachment theory. The Reader comprises 15 succinct chapters by many of the most influential researchers in the theory, covering the basis of attachment theory and the current state of the field. The book brings together a wide range of works, many of which challenge common assumptions and offer intriguing new insights on attachment theory and research. Topics include psychoanalytic theories of separation anxiety, concepts of anxiety, stress, and homeostasis, the origins of disorganized attachment, cultural differences in caregiving practices, reactive attachment disorder (RAD) and disinhibited social engagement disorder (DSED), the future prospects of attachment theory, and more.

Author: Joel B. Hagen
Publisher: University Alabama Press
ISBN: 081732089X
Category : Science
Languages : en
Pages : 356

Get Book Here

Book Description
Traces historical developments in scientific conceptions of physiology, ecology, behavior, and evolutionary biology during the mid-twentieth century Life Out of Balance focuses on a period in history when new ideas of self-regulation, adaptation, and fitness became central to a variety of biological disciplines. During the decades surrounding World War II, these ideas developed in several quite different contexts and led to greater debates about the merits of such models as applied to larger systems, including society at large. Particularly in its later cybernetic form, homeostasis seemed to provide new ways of discussing balance and regulation that avoided discredited approaches of earlier champions of vitalism and mechanism. It provided a common perspective and terminology for discussing self-regulating “systems,” whether biological, mechanical, or social. Although enormously fruitful and influential, homeostatic perspectives also generated numerous controversies when critics questioned the degree to which biological systems are characterized by balance and self-regulation. Resolving these controversies continues to be a challenge in modern biology. If natural selection constitutes the first law of biology, scientists who champion homeostasis as a theoretical model claim that it is a second law, equally important and closely related to the first. Such claims notwithstanding, homeostasis has generated a series of controversies since it was formalized by Walter Cannon in the late 1920s. Critics contended that Cannon took a too-optimistic view of life, not only ignoring pathological deviations from normality but also failing to adequately explain the ability of living things to respond adaptively to environmental challenges. Underlying these controversies was the unresolved problem of integrating physiology and other areas of functional biology with the emerging evolutionary synthesis of Mendelian genetics and Darwinian natural selection. The physiological idea of homeostasis as the adaptive “fit” between the organism and its environment and the Darwinian idea of adaptation and fitness in terms of reproductive success might seem to be complementary in an unproblematic way, but historically they have had an uneasy relationship.

Author: Brian D. Fath
Publisher: Newnes
ISBN: 008091456X
Category : Science
Languages : en
Pages : 4292

Get Book Here

Book Description
The groundbreaking Encyclopedia of Ecology provides an authoritative and comprehensive coverage of the complete field of ecology, from general to applied. It includes over 500 detailed entries, structured to provide the user with complete coverage of the core knowledge, accessed as intuitively as possible, and heavily cross-referenced. Written by an international team of leading experts, this revolutionary encyclopedia will serve as a one-stop-shop to concise, stand-alone articles to be used as a point of entry for undergraduate students, or as a tool for active researchers looking for the latest information in the field. Entries cover a range of topics, including: Behavioral Ecology Ecological Processes Ecological Modeling Ecological Engineering Ecological Indicators Ecological Informatics Ecosystems Ecotoxicology Evolutionary Ecology General Ecology Global Ecology Human Ecology System Ecology The first reference work to cover all aspects of ecology, from basic to applied Over 500 concise, stand-alone articles are written by prominent leaders in the field Article text is supported by full-color photos, drawings, tables, and other visual material Fully indexed and cross referenced with detailed references for further study Writing level is suited to both the expert and non-expert Available electronically on ScienceDirect shortly upon publication

Author: Chunhua Liu
Publisher: Frontiers Media SA
ISBN: 2889637972
Category :
Languages : en
Pages : 239

Get Book Here

Book Description
Aquatic plants refer to a diverse group of aquatic photosynthetic organisms large enough to be seem with the naked eye, and the vegetative parts of which actively grow either permanently or periodically (for at least several weeks each year) submerged below, floating on, or growing up through the water surface. These include aquatic vascular plants, aquatic mosses and some larger algae. Aquatic plants are grouped into life forms, each of which relates differently to limiting factors and has distinct ecological functions in aquatic ecosystems. Life form groups include emergent macrophytes (plants that are rooted in sediment or soils that are periodically inundated, with all other structures extending into the air), floating-leaved macrophytes (rooted plants with leaves that float on the water surface), submersed macrophytes (rooted plants growing completely submerged), free submerged macrophytes (which are not rooted but attached to other macrophytes or submerged structures) and free-floating macrophytes (plants that float on the water surface). Aquatic plants play an important role in the structure and function of aquatic ecosystems by altering water movement regimes, providing shelter and refuge and serving as a food source. In addition, aquatic plants produce large standing crops which can also stabilize sediments, accumulate large amounts of nutrients thus improving water healthy. Thus, because of their ecological role, aquatic plants are an important component of aquatic ecosystems. Aquatic plants are very vulnerable to human activities and global changes, and many species of the plants had become endangered in the past several decades due to habitat loss, flooding, damming, over foraging, biological invasion and eutrophication, which might not be halted but enforced in the future when more extreme weathers coincide with enhanced human activities.