On the abundance and distribution of organisms in fragmented riverscapes : Insights From Studies On Different Species And Spatiotemporal Scales
Dams in rivers modify the habitats and hinder dispersal and migration. Since moving around is an essential part of most organisms’ life histories, this represents a new regime for life in freshwater. This thesis addresses several issues that are either directly or indirectly related to fragmentati...
Main Author: | |
---|---|
Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
Published: |
Linnéuniversitetet, Institutionen för biologi och miljö (BOM)
2023
|
Subjects: | |
Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-123269 https://doi.org/10.15626/LUD.498.2023 |
id |
ftlinnaeusuniv:oai:DiVA.org:lnu-123269 |
---|---|
record_format |
openpolar |
spelling |
ftlinnaeusuniv:oai:DiVA.org:lnu-123269 2024-04-21T08:01:41+00:00 On the abundance and distribution of organisms in fragmented riverscapes : Insights From Studies On Different Species And Spatiotemporal Scales Tamario, Carl 2023 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-123269 https://doi.org/10.15626/LUD.498.2023 eng eng Linnéuniversitetet, Institutionen för biologi och miljö (BOM) Linnaeus University Dissertations 498 orcid:0000-0002-3176-130x http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-123269 urn:isbn:9789180820493 urn:isbn:9789180820509 doi:10.15626/LUD.498.2023 info:eu-repo/semantics/openAccess Ecology Ekologi Evolutionary Biology Evolutionsbiologi Doctoral thesis, comprehensive summary info:eu-repo/semantics/doctoralThesis text 2023 ftlinnaeusuniv https://doi.org/10.15626/LUD.498.2023 2024-03-27T17:47:42Z Dams in rivers modify the habitats and hinder dispersal and migration. Since moving around is an essential part of most organisms’ life histories, this represents a new regime for life in freshwater. This thesis addresses several issues that are either directly or indirectly related to fragmentation and aims to contribute to our understanding of living and coping in fragmented riverscapes. It contains studies conducted on different study species and several spatial, temporal, and ecological scales. I first show that individuals in spawning migrating populations of cyprinid fish are phenotypically sorted along the length of a river with culverts. Results support the spatial sorting hypothesis, and are consistent between species, between sexes, and among individuals within sex; smaller and slimmer fish migrate further. I next show that eel ladders, which are passage solutions at dams aimed at increasing the distribution of European eel, did not remove the negative barrier effect of the dam. Next, I show that the spatial configuration of distinct rapid-flowing habitats has significant impacts on the well-being of brown trout populations. Subpopulations in larger and closer located habitats were significantly denser and more stable, likely because of lower extinction rates and higher immigration rates. I further evaluated the effects of dams on spatial synchrony in populations of trout, Eurasian minnow, and northern pike; dams contributed to demographic isolation by decreasing synchrony in the two former species, but the effects of population synchrony on global population viability were weak. Lastly, I show how the distribution and demography of the threatened freshwater pearl mussel is influenced by environmental heterogeneity and viability of host fish populations. Mussel populations residing in colder regions, and in locations with more viable host fish populations, had retained recruitment to a higher degree. The long-lived mussels exemplify how stress in aquatic environments can accumulate and manifest over ... Doctoral or Postdoctoral Thesis European eel Linnaeus University Kalmar Växjö: Publications (DiVA) |
institution |
Open Polar |
collection |
Linnaeus University Kalmar Växjö: Publications (DiVA) |
op_collection_id |
ftlinnaeusuniv |
language |
English |
topic |
Ecology Ekologi Evolutionary Biology Evolutionsbiologi |
spellingShingle |
Ecology Ekologi Evolutionary Biology Evolutionsbiologi Tamario, Carl On the abundance and distribution of organisms in fragmented riverscapes : Insights From Studies On Different Species And Spatiotemporal Scales |
topic_facet |
Ecology Ekologi Evolutionary Biology Evolutionsbiologi |
description |
Dams in rivers modify the habitats and hinder dispersal and migration. Since moving around is an essential part of most organisms’ life histories, this represents a new regime for life in freshwater. This thesis addresses several issues that are either directly or indirectly related to fragmentation and aims to contribute to our understanding of living and coping in fragmented riverscapes. It contains studies conducted on different study species and several spatial, temporal, and ecological scales. I first show that individuals in spawning migrating populations of cyprinid fish are phenotypically sorted along the length of a river with culverts. Results support the spatial sorting hypothesis, and are consistent between species, between sexes, and among individuals within sex; smaller and slimmer fish migrate further. I next show that eel ladders, which are passage solutions at dams aimed at increasing the distribution of European eel, did not remove the negative barrier effect of the dam. Next, I show that the spatial configuration of distinct rapid-flowing habitats has significant impacts on the well-being of brown trout populations. Subpopulations in larger and closer located habitats were significantly denser and more stable, likely because of lower extinction rates and higher immigration rates. I further evaluated the effects of dams on spatial synchrony in populations of trout, Eurasian minnow, and northern pike; dams contributed to demographic isolation by decreasing synchrony in the two former species, but the effects of population synchrony on global population viability were weak. Lastly, I show how the distribution and demography of the threatened freshwater pearl mussel is influenced by environmental heterogeneity and viability of host fish populations. Mussel populations residing in colder regions, and in locations with more viable host fish populations, had retained recruitment to a higher degree. The long-lived mussels exemplify how stress in aquatic environments can accumulate and manifest over ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Tamario, Carl |
author_facet |
Tamario, Carl |
author_sort |
Tamario, Carl |
title |
On the abundance and distribution of organisms in fragmented riverscapes : Insights From Studies On Different Species And Spatiotemporal Scales |
title_short |
On the abundance and distribution of organisms in fragmented riverscapes : Insights From Studies On Different Species And Spatiotemporal Scales |
title_full |
On the abundance and distribution of organisms in fragmented riverscapes : Insights From Studies On Different Species And Spatiotemporal Scales |
title_fullStr |
On the abundance and distribution of organisms in fragmented riverscapes : Insights From Studies On Different Species And Spatiotemporal Scales |
title_full_unstemmed |
On the abundance and distribution of organisms in fragmented riverscapes : Insights From Studies On Different Species And Spatiotemporal Scales |
title_sort |
on the abundance and distribution of organisms in fragmented riverscapes : insights from studies on different species and spatiotemporal scales |
publisher |
Linnéuniversitetet, Institutionen för biologi och miljö (BOM) |
publishDate |
2023 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-123269 https://doi.org/10.15626/LUD.498.2023 |
genre |
European eel |
genre_facet |
European eel |
op_relation |
Linnaeus University Dissertations 498 orcid:0000-0002-3176-130x http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-123269 urn:isbn:9789180820493 urn:isbn:9789180820509 doi:10.15626/LUD.498.2023 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.15626/LUD.498.2023 |
_version_ |
1796941816923160576 |