Classification of Icelandic watersheds and rivers to explain life history strategies of Atlantic salmon

A hierarchical classification system of Iceland's watersheds and rivers is presented. The classification is based on Iceland's substrate, climate, water, biota, and human cultural influences. The geological formations of Iceland are very different in character depending on their age and fo...

Full description

Bibliographic Details
Main Author: Gudjonsson, Sigurdur
Other Authors: Warren, Charles E., Liss, William J., Moore, Frank, Hall, James D., Rosenfeld, Charles L., Matzke, Gordon, Fisheries and Wildlife, Oregon State University. Graduate School
Format: Doctoral or Postdoctoral Thesis
Language:English
unknown
Published: Oregon State University
Subjects:
Online Access:https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/nv935535q
id ftoregonstate:ir.library.oregonstate.edu:nv935535q
record_format openpolar
spelling ftoregonstate:ir.library.oregonstate.edu:nv935535q 2024-09-15T17:56:17+00:00 Classification of Icelandic watersheds and rivers to explain life history strategies of Atlantic salmon Gudjonsson, Sigurdur Warren, Charles E. Liss, William J. Moore, Frank Hall, James D. Rosenfeld, Charles L. Matzke, Gordon Fisheries and Wildlife Oregon State University. Graduate School https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/nv935535q English [eng] eng unknown Oregon State University https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/nv935535q Copyright Not Evaluated Atlantic salmon -- Iceland Rivers -- Iceland -- Classification Dissertation ftoregonstate 2024-07-22T18:06:07Z A hierarchical classification system of Iceland's watersheds and rivers is presented. The classification is based on Iceland's substrate, climate, water, biota, and human cultural influences. The geological formations of Iceland are very different in character depending on their age and formation history. Three major types of formations occur: Tertiary, Plio-Pleistocene, and Pleistocene. These formations have different hydrological characters and different landscapes. There are also large differences in the climate within Iceland. Four major river types are found in Iceland: spring-fed rivers in Pleistocene areas, direct runoff rivers in Plio-Pleistocene areas, direct runoff rivers in Tertiary areas and wetland heath rivers in Tertiary areas. Eleven biogeoclimatic regions occur in Iceland, each having a different watershed type. The classification together with life history theory can explain the distributions, abundances, and life history strategies of Icelandic salmonids. Oceanic conditions must also be considered to explain the life history patterns of anadromous populations. When the freshwater and marine habitat is stable, the life history patterns of individuals in a population tend to be uniform, one life history form being most common. In an unstable environment many life history forms occur and the life span of one generation is long. The properties of the habitat can further explain which life history types are present. In the most stable and favorable rivers of Iceland resident life history forms are more common. Such a classification of a river habitat greatly aids the understanding of the habitat and how it enables and constrains the salmonid populations within it. Consequently adaptations in life histories are better understood and conservation, utilization, and management of these valuable natural resources are made more coherent and efficient. Doctoral or Postdoctoral Thesis Atlantic salmon Iceland ScholarsArchive@OSU (Oregon State University)
institution Open Polar
collection ScholarsArchive@OSU (Oregon State University)
op_collection_id ftoregonstate
language English
unknown
topic Atlantic salmon -- Iceland
Rivers -- Iceland -- Classification
spellingShingle Atlantic salmon -- Iceland
Rivers -- Iceland -- Classification
Gudjonsson, Sigurdur
Classification of Icelandic watersheds and rivers to explain life history strategies of Atlantic salmon
topic_facet Atlantic salmon -- Iceland
Rivers -- Iceland -- Classification
description A hierarchical classification system of Iceland's watersheds and rivers is presented. The classification is based on Iceland's substrate, climate, water, biota, and human cultural influences. The geological formations of Iceland are very different in character depending on their age and formation history. Three major types of formations occur: Tertiary, Plio-Pleistocene, and Pleistocene. These formations have different hydrological characters and different landscapes. There are also large differences in the climate within Iceland. Four major river types are found in Iceland: spring-fed rivers in Pleistocene areas, direct runoff rivers in Plio-Pleistocene areas, direct runoff rivers in Tertiary areas and wetland heath rivers in Tertiary areas. Eleven biogeoclimatic regions occur in Iceland, each having a different watershed type. The classification together with life history theory can explain the distributions, abundances, and life history strategies of Icelandic salmonids. Oceanic conditions must also be considered to explain the life history patterns of anadromous populations. When the freshwater and marine habitat is stable, the life history patterns of individuals in a population tend to be uniform, one life history form being most common. In an unstable environment many life history forms occur and the life span of one generation is long. The properties of the habitat can further explain which life history types are present. In the most stable and favorable rivers of Iceland resident life history forms are more common. Such a classification of a river habitat greatly aids the understanding of the habitat and how it enables and constrains the salmonid populations within it. Consequently adaptations in life histories are better understood and conservation, utilization, and management of these valuable natural resources are made more coherent and efficient.
author2 Warren, Charles E.
Liss, William J.
Moore, Frank
Hall, James D.
Rosenfeld, Charles L.
Matzke, Gordon
Fisheries and Wildlife
Oregon State University. Graduate School
format Doctoral or Postdoctoral Thesis
author Gudjonsson, Sigurdur
author_facet Gudjonsson, Sigurdur
author_sort Gudjonsson, Sigurdur
title Classification of Icelandic watersheds and rivers to explain life history strategies of Atlantic salmon
title_short Classification of Icelandic watersheds and rivers to explain life history strategies of Atlantic salmon
title_full Classification of Icelandic watersheds and rivers to explain life history strategies of Atlantic salmon
title_fullStr Classification of Icelandic watersheds and rivers to explain life history strategies of Atlantic salmon
title_full_unstemmed Classification of Icelandic watersheds and rivers to explain life history strategies of Atlantic salmon
title_sort classification of icelandic watersheds and rivers to explain life history strategies of atlantic salmon
publisher Oregon State University
url https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/nv935535q
genre Atlantic salmon
Iceland
genre_facet Atlantic salmon
Iceland
op_relation https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/nv935535q
op_rights Copyright Not Evaluated
_version_ 1810432500531462144