TAILIEUCHUNG - Insect Ecology - An Ecosystem Approach 2nd ed - Chapter 12

12 Herbivory HERBIVORY IS THE RATE OF CONSUMPTION BY ANIMALS OF ANY PLANT parts, including foliage, stems, roots, flowers, fruits, or seeds. Direct effects of insects on plant reproductive parts are addressed in Chapter 13. Herbivory is a key ecosystem process that reduces density of plants or plant materials. | 12 Herbivory I. Types and Patterns of Herbivory A. Herbivore Functional Groups B. Measurement of Herbivory C. Spatial and Temporal Patterns of Herbivory II. Effects of Herbivory A. Plant Productivity Survival and Growth Form B. Community Dynamics C. Water and Nutrient Fluxes D. Effects on Climate and Disturbance Regime III. Summary HERBIVORY IS THE RATE OF CONSUMPTION BY ANIMALS OF ANY PLANT parts including foliage stems roots flowers fruits or seeds. Direct effects of insects on plant reproductive parts are addressed in Chapter 13. Herbivory is a key ecosystem process that reduces density of plants or plant materials transfers mass and nutrients to the soil or water column and affects habitat and resource conditions for other organisms. Insects are the primary herbivores in many ecosystems and their effect on primary production can equal or exceed that of more conspicuous vertebrate grazers in grasslands . A. Andersen and Lonsdale 1990 Gandar 1982 Sinclair 1975 Weisser and Siemann 2004 Wiegert and Evans 1967 . Loss of plant material through herbivory generally is negligible or at least inconspicuous but periodic outbreaks of herbivores have a well-known capacity to reduce growth and survival of host species by as much as 100 and to alter vegetation structure over large areas. A key aspect of herbivory is its variation in intensity among plant species reflecting biochemical interactions between the herbivore and the various host and nonhost species that comprise the vegetation see Chapter 3 . Effects of herbivory on ecosystem processes depend on the type of herbivore and pattern of consumption as well as its intensity. Measurement and comparison of herbivory and its effects among ecosystems and environmental conditions remain problematic as a result of lack of standardized techniques for measuring or manipulating intensity. Few studies have assessed the effects of herbivory on ecosystem processes other than primary production. Nevertheless accumulating evidence

TỪ KHÓA LIÊN QUAN
TAILIEUCHUNG - Chia sẻ tài liệu không giới hạn
Địa chỉ : 444 Hoang Hoa Tham, Hanoi, Viet Nam
Website : tailieuchung.com
Email : tailieuchung20@gmail.com
Tailieuchung.com là thư viện tài liệu trực tuyến, nơi chia sẽ trao đổi hàng triệu tài liệu như luận văn đồ án, sách, giáo trình, đề thi.
Chúng tôi không chịu trách nhiệm liên quan đến các vấn đề bản quyền nội dung tài liệu được thành viên tự nguyện đăng tải lên, nếu phát hiện thấy tài liệu xấu hoặc tài liệu có bản quyền xin hãy email cho chúng tôi.
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.