Author: John Hudson
Publisher:
ISBN: 9780939431380
Category : Aquatic insects
Languages : en
Pages : 140
Book Description
Aquatic Insects in Alaska
Author: John Hudson
Publisher:
ISBN: 9780939431380
Category : Aquatic insects
Languages : en
Pages : 140
Book Description
Publisher:
ISBN: 9780939431380
Category : Aquatic insects
Languages : en
Pages : 140
Book Description
Studies on the Aquatic Insects of Southeastern Alaska, with an Emphasis on the Skagway Area
Author: Kimberly T. Huntzinger
Publisher:
ISBN:
Category : Aquatic insects
Languages : en
Pages : 134
Book Description
Publisher:
ISBN:
Category : Aquatic insects
Languages : en
Pages : 134
Book Description
The Forest Ecosystem of Southeast Alaska: Forest insects, by J. S. Hard
Author: Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
Publisher:
ISBN:
Category : Forest ecology
Languages : en
Pages : 40
Book Description
Publisher:
ISBN:
Category : Forest ecology
Languages : en
Pages : 40
Book Description
Aquatic insect community structure and secondary production in southcentral Alaska streams with contrasting thermal and hydrologic regimes
Author: Samantha Diane Hertel
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
The Forest Ecosystem of Southeast Alaska
Author: John S. Hard
Publisher:
ISBN:
Category : Forest ecology
Languages : en
Pages : 40
Book Description
Southeast Alaska's remaining virgin forests have few insect pests. The black-headed budworm and the hemlock sawfly, both western hemlock defoliators, are the most important species. They kill some trees, kill tops in others, and cause growth loss, but stands survive their attacks. Extensive conversion of virgin stands to second growth may result in an increase in pest problems as it has in similar areas such as coastal British Columbia. ??Widespread use of insecticides to control major outbreaks is not practical because of risk of contaminating salmon-spawning and trout-rearing streams; but insecticide use may be justified in local, high value areas. Weather, diseases, and parasites control outbreaks naturally. Damage-prone stands should be identified and harvested before insect attack or salvage-logged following outbreaks. Ideally, second-growth stands should be managed for resistance to insect pests.
Publisher:
ISBN:
Category : Forest ecology
Languages : en
Pages : 40
Book Description
Southeast Alaska's remaining virgin forests have few insect pests. The black-headed budworm and the hemlock sawfly, both western hemlock defoliators, are the most important species. They kill some trees, kill tops in others, and cause growth loss, but stands survive their attacks. Extensive conversion of virgin stands to second growth may result in an increase in pest problems as it has in similar areas such as coastal British Columbia. ??Widespread use of insecticides to control major outbreaks is not practical because of risk of contaminating salmon-spawning and trout-rearing streams; but insecticide use may be justified in local, high value areas. Weather, diseases, and parasites control outbreaks naturally. Damage-prone stands should be identified and harvested before insect attack or salvage-logged following outbreaks. Ideally, second-growth stands should be managed for resistance to insect pests.
Some Effects of DDT on the Ecology of Salmon Streams in Southeastern Alaska
Author: Roger J. Reed
Publisher:
ISBN:
Category : DDT (Insecticide)
Languages : en
Pages : 24
Book Description
Publisher:
ISBN:
Category : DDT (Insecticide)
Languages : en
Pages : 24
Book Description
Dragonflies of Alaska
Author: John Hudson
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 52
Book Description
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 52
Book Description
Predaceous Diving Beetles (Coleoptera: Dytiscidae) of the Nearctic Region, with Emphasis on the Fauna of Canada and Alaska
Author: D. J. Larson
Publisher: NRC Research Press
ISBN: 0660179679
Category : Nature
Languages : en
Pages : 997
Book Description
This book first reviews the biology of Dytiscidae or water beetles, including life history and ecology. It then defines and keys adults & larvae (when known) of dytiscid fauna of Canada, the United States, and for some taxa also northern Mexico. The focus is on the fauna of Canada & Alaska, and adults of the 276 species known from this region are treated in detail. For each Canadian-Alaskan species, the following information is presented: nomenclature & synonymy; selected references; description, including illustrations of taxonomically important characteristics; comments on classification or variation; notes on ecology; and description of the species range, accompanied by a map of collection records. Checklists of the dytiscid fauna of Canada/Alaska are also presented, with the distribution of the species recorded by province/territory and Canadian ecozone. Includes systematic index.
Publisher: NRC Research Press
ISBN: 0660179679
Category : Nature
Languages : en
Pages : 997
Book Description
This book first reviews the biology of Dytiscidae or water beetles, including life history and ecology. It then defines and keys adults & larvae (when known) of dytiscid fauna of Canada, the United States, and for some taxa also northern Mexico. The focus is on the fauna of Canada & Alaska, and adults of the 276 species known from this region are treated in detail. For each Canadian-Alaskan species, the following information is presented: nomenclature & synonymy; selected references; description, including illustrations of taxonomically important characteristics; comments on classification or variation; notes on ecology; and description of the species range, accompanied by a map of collection records. Checklists of the dytiscid fauna of Canada/Alaska are also presented, with the distribution of the species recorded by province/territory and Canadian ecozone. Includes systematic index.
Insects and Diseases of Alaskan Forests
Author: Edward H. Holsten
Publisher:
ISBN:
Category : Forest insects
Languages : en
Pages : 246
Book Description
Publisher:
ISBN:
Category : Forest insects
Languages : en
Pages : 246
Book Description
Insects of South-Central Alaska
Author: Dominique M. Collet
Publisher: Branch Line Video
ISBN: 9781594330742
Category : Insects
Languages : en
Pages : 192
Book Description
Publisher: Branch Line Video
ISBN: 9781594330742
Category : Insects
Languages : en
Pages : 192
Book Description