Journal article 873 views
Contrasting trophic-cascade effects driven by variation in morphology of the perches used by a larval damselfly
Qinghua Zhao,
YinG Pan,
John Griffin 
,
Junzhao Sun,
Shucun Sun
,
Junzhao Sun,
Shucun Sun
Freshwater Biology, Volume: 61, Issue: 5, Pages: 693 - 701
Swansea University Author:
John Griffin
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DOI (Published version): 10.1111/fwb.12739
Abstract
1. The presence of habitat structures (e.g. caves, ledges, branches) has well-documented ecologicaleffects. However, it remains largely unknown how variation in the morphology of particular habitatstructures affects ecological interactions.2. Using an algae–cladoceran grazer–larval damselfly food ch...
| Published in: | Freshwater Biology |
|---|---|
| ISSN: | 00465070 |
| Published: |
2016
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa31869 |
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<?xml version="1.0"?><rfc1807><datestamp>2019-08-05T14:20:39.5335708</datestamp><bib-version>v2</bib-version><id>31869</id><entry>2017-02-06</entry><title>Contrasting trophic-cascade effects driven by variation in morphology of the perches used by a larval damselfly</title><swanseaauthors><author><sid>9814fbffa76dd9c9a207166354cd0b2f</sid><ORCID>0000-0003-3295-6480</ORCID><firstname>John</firstname><surname>Griffin</surname><name>John Griffin</name><active>true</active><ethesisStudent>false</ethesisStudent></author></swanseaauthors><date>2017-02-06</date><deptcode>SBI</deptcode><abstract>1. The presence of habitat structures (e.g. caves, ledges, branches) has well-documented ecologicaleffects. However, it remains largely unknown how variation in the morphology of particular habitatstructures affects ecological interactions.2. Using an algae–cladoceran grazer–larval damselfly food chain as a model in a series of microcosmexperiments, we manipulated food-chain length and the length (long versus short) and diameter(thick versus thin) of vertically orientated damselfly perches (habitat structure) and examined thedensity of the grazers and algae. Because the larval damselflies are usually more flexible on thinnerperches and have broader foraging domains on longer perches, we predicted that when on long andthin perches they would suppress grazer density more efficiently and hence confer a more positivetrophic-cascade effect on algal growth.3. As predicted, larval damselflies occupying long and thin perches most strongly reduced grazerdensity and increased algal density, illustrating a positive trophic cascade. In all other damselflytreatments, and despite reduced grazer density, algal density declined, showing a negative trophiccascade due to an elevation in grazer foraging efficiency under predation risk. This probably resultedfrom the increased activity of the grazers and their spatial shift to the lower water column wherealgal density was higher.4. In conclusion, perch morphology affected the direction and strength of the trophic cascade byaltering both density-mediated and behaviour-mediated indirect interactions. Considering thatanthropogenic disturbance is dramatically changing the morphological diversity of habitat structures,we call for more research into the ecological consequences of such physical diversity at communityand ecosystem levels.</abstract><type>Journal Article</type><journal>Freshwater Biology</journal><volume>61</volume><journalNumber>5</journalNumber><paginationStart>693</paginationStart><paginationEnd>701</paginationEnd><publisher/><issnPrint>00465070</issnPrint><keywords>algae–cladoceran–damselfly, habitat structures, morphology, species interaction, trophic cascade</keywords><publishedDay>4</publishedDay><publishedMonth>4</publishedMonth><publishedYear>2016</publishedYear><publishedDate>2016-04-04</publishedDate><doi>10.1111/fwb.12739</doi><url/><notes/><college>COLLEGE NANME</college><department>Biosciences</department><CollegeCode>COLLEGE CODE</CollegeCode><DepartmentCode>SBI</DepartmentCode><institution>Swansea University</institution><apcterm/><lastEdited>2019-08-05T14:20:39.5335708</lastEdited><Created>2017-02-06T12:59:07.6116437</Created><path><level id="1">Faculty of Science and Engineering</level><level id="2">School of Biosciences, Geography and Physics - Biosciences</level></path><authors><author><firstname>Qinghua</firstname><surname>Zhao</surname><order>1</order></author><author><firstname>YinG</firstname><surname>Pan</surname><order>2</order></author><author><firstname>John</firstname><surname>Griffin</surname><orcid>0000-0003-3295-6480</orcid><order>3</order></author><author><firstname>Junzhao</firstname><surname>Sun</surname><order>4</order></author><author><firstname>Shucun</firstname><surname>Sun</surname><order>5</order></author></authors><documents/><OutputDurs/></rfc1807> |
| spelling |
2019-08-05T14:20:39.5335708 v2 31869 2017-02-06 Contrasting trophic-cascade effects driven by variation in morphology of the perches used by a larval damselfly 9814fbffa76dd9c9a207166354cd0b2f 0000-0003-3295-6480 John Griffin John Griffin true false 2017-02-06 SBI 1. The presence of habitat structures (e.g. caves, ledges, branches) has well-documented ecologicaleffects. However, it remains largely unknown how variation in the morphology of particular habitatstructures affects ecological interactions.2. Using an algae–cladoceran grazer–larval damselfly food chain as a model in a series of microcosmexperiments, we manipulated food-chain length and the length (long versus short) and diameter(thick versus thin) of vertically orientated damselfly perches (habitat structure) and examined thedensity of the grazers and algae. Because the larval damselflies are usually more flexible on thinnerperches and have broader foraging domains on longer perches, we predicted that when on long andthin perches they would suppress grazer density more efficiently and hence confer a more positivetrophic-cascade effect on algal growth.3. As predicted, larval damselflies occupying long and thin perches most strongly reduced grazerdensity and increased algal density, illustrating a positive trophic cascade. In all other damselflytreatments, and despite reduced grazer density, algal density declined, showing a negative trophiccascade due to an elevation in grazer foraging efficiency under predation risk. This probably resultedfrom the increased activity of the grazers and their spatial shift to the lower water column wherealgal density was higher.4. In conclusion, perch morphology affected the direction and strength of the trophic cascade byaltering both density-mediated and behaviour-mediated indirect interactions. Considering thatanthropogenic disturbance is dramatically changing the morphological diversity of habitat structures,we call for more research into the ecological consequences of such physical diversity at communityand ecosystem levels. Journal Article Freshwater Biology 61 5 693 701 00465070 algae–cladoceran–damselfly, habitat structures, morphology, species interaction, trophic cascade 4 4 2016 2016-04-04 10.1111/fwb.12739 COLLEGE NANME Biosciences COLLEGE CODE SBI Swansea University 2019-08-05T14:20:39.5335708 2017-02-06T12:59:07.6116437 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences Qinghua Zhao 1 YinG Pan 2 John Griffin 0000-0003-3295-6480 3 Junzhao Sun 4 Shucun Sun 5 |
| title |
Contrasting trophic-cascade effects driven by variation in morphology of the perches used by a larval damselfly |
| spellingShingle |
Contrasting trophic-cascade effects driven by variation in morphology of the perches used by a larval damselfly John Griffin |
| title_short |
Contrasting trophic-cascade effects driven by variation in morphology of the perches used by a larval damselfly |
| title_full |
Contrasting trophic-cascade effects driven by variation in morphology of the perches used by a larval damselfly |
| title_fullStr |
Contrasting trophic-cascade effects driven by variation in morphology of the perches used by a larval damselfly |
| title_full_unstemmed |
Contrasting trophic-cascade effects driven by variation in morphology of the perches used by a larval damselfly |
| title_sort |
Contrasting trophic-cascade effects driven by variation in morphology of the perches used by a larval damselfly |
| author_id_str_mv |
9814fbffa76dd9c9a207166354cd0b2f |
| author_id_fullname_str_mv |
9814fbffa76dd9c9a207166354cd0b2f_***_John Griffin |
| author |
John Griffin |
| author2 |
Qinghua Zhao YinG Pan John Griffin Junzhao Sun Shucun Sun |
| format |
Journal article |
| container_title |
Freshwater Biology |
| container_volume |
61 |
| container_issue |
5 |
| container_start_page |
693 |
| publishDate |
2016 |
| institution |
Swansea University |
| issn |
00465070 |
| doi_str_mv |
10.1111/fwb.12739 |
| college_str |
Faculty of Science and Engineering |
| hierarchytype |
|
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facultyofscienceandengineering |
| hierarchy_top_title |
Faculty of Science and Engineering |
| hierarchy_parent_id |
facultyofscienceandengineering |
| hierarchy_parent_title |
Faculty of Science and Engineering |
| department_str |
School of Biosciences, Geography and Physics - Biosciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Biosciences |
| document_store_str |
0 |
| active_str |
0 |
| description |
1. The presence of habitat structures (e.g. caves, ledges, branches) has well-documented ecologicaleffects. However, it remains largely unknown how variation in the morphology of particular habitatstructures affects ecological interactions.2. Using an algae–cladoceran grazer–larval damselfly food chain as a model in a series of microcosmexperiments, we manipulated food-chain length and the length (long versus short) and diameter(thick versus thin) of vertically orientated damselfly perches (habitat structure) and examined thedensity of the grazers and algae. Because the larval damselflies are usually more flexible on thinnerperches and have broader foraging domains on longer perches, we predicted that when on long andthin perches they would suppress grazer density more efficiently and hence confer a more positivetrophic-cascade effect on algal growth.3. As predicted, larval damselflies occupying long and thin perches most strongly reduced grazerdensity and increased algal density, illustrating a positive trophic cascade. In all other damselflytreatments, and despite reduced grazer density, algal density declined, showing a negative trophiccascade due to an elevation in grazer foraging efficiency under predation risk. This probably resultedfrom the increased activity of the grazers and their spatial shift to the lower water column wherealgal density was higher.4. In conclusion, perch morphology affected the direction and strength of the trophic cascade byaltering both density-mediated and behaviour-mediated indirect interactions. Considering thatanthropogenic disturbance is dramatically changing the morphological diversity of habitat structures,we call for more research into the ecological consequences of such physical diversity at communityand ecosystem levels. |
| published_date |
2016-04-04T03:38:58Z |
| _version_ |
1763751744256344064 |
| score |
11.013731 |