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Environmental degradation amplifies species' responses to temperature variation in a trophic interaction

Marianne Mugabo, David Gilljam, Laura Petteway, Chenggui Yuan, Mike Fowler Orcid Logo, Steven M. Sait

Journal of Animal Ecology, Volume: 88, Issue: 11

Swansea University Author: Mike Fowler Orcid Logo

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DOI (Published version): 10.1111/1365-2656.13069

Abstract

1. Land-use and climate change are two of the primary drivers of the current biodiversity crisis. However, we lack understanding of how single-species and multi-species associations are affected by interactions between multiple environmental stressors.2. We address this gap by examining how environm...

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Published in: Journal of Animal Ecology
ISSN: 0021-8790 1365-2656
Published: 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa50631
first_indexed 2019-06-05T11:08:02Z
last_indexed 2020-06-26T19:01:51Z
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We address this gap by examining how environmental degradation interacts with daily stochastic temperature variation to affect individual life history and population dynamics in a host-parasitoid trophic interaction, using the Indian meal moth, Plodia interpunctella, and its parasitoid wasp Venturia canescens. 3. We carried out a single generation individual life history experiment and a multi-generation microcosm experiment during which individuals and microcosms were maintained at a mean temperature of 26 &#xBA;C that was either kept constant or varied stochastically, at four levels of host resource degradation, in the presence or absence of parasitoids.4. At the individual level, resource degradation increased juvenile development time and decreased adult body size in both species. Parasitoids were more sensitive to temperature variation than their hosts, with a shorter juvenile stage duration than in constant temperatures and a longer adult lifespan in moderately degraded environments. Resource degradation also altered the host&#x2019;s response to temperature variation, leading to a longer juvenile development time at high resource degradation. At the population level, moderate resource degradation amplified the effects of temperature variation on host and parasitoid populations compared to no or high resource degradation and parasitoid overall abundance was lower in fluctuating temperatures. Top-down regulation by the parasitoid and bottom-up regulation driven by resource degradation contributed to more than 50 % of host and parasitoid population responses to temperature variation.5. Our results demonstrate that environmental degradation can strongly affect how species in a trophic interaction respond to short-term temperature fluctuations through direct and indirect trait-mediated effects. The effects are driven by species differences in sensitivity to environmental conditions and modulate top-down (parasitism) and bottom-up (resource) regulation. 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spelling 2020-06-26T17:46:41.7764790 v2 50631 2019-06-04 Environmental degradation amplifies species' responses to temperature variation in a trophic interaction a3a29027498d4b43a3f082a0a5ba16b4 0000-0003-1544-0407 Mike Fowler Mike Fowler true false 2019-06-04 BGPS 1. Land-use and climate change are two of the primary drivers of the current biodiversity crisis. However, we lack understanding of how single-species and multi-species associations are affected by interactions between multiple environmental stressors.2. We address this gap by examining how environmental degradation interacts with daily stochastic temperature variation to affect individual life history and population dynamics in a host-parasitoid trophic interaction, using the Indian meal moth, Plodia interpunctella, and its parasitoid wasp Venturia canescens. 3. We carried out a single generation individual life history experiment and a multi-generation microcosm experiment during which individuals and microcosms were maintained at a mean temperature of 26 ºC that was either kept constant or varied stochastically, at four levels of host resource degradation, in the presence or absence of parasitoids.4. At the individual level, resource degradation increased juvenile development time and decreased adult body size in both species. Parasitoids were more sensitive to temperature variation than their hosts, with a shorter juvenile stage duration than in constant temperatures and a longer adult lifespan in moderately degraded environments. Resource degradation also altered the host’s response to temperature variation, leading to a longer juvenile development time at high resource degradation. At the population level, moderate resource degradation amplified the effects of temperature variation on host and parasitoid populations compared to no or high resource degradation and parasitoid overall abundance was lower in fluctuating temperatures. Top-down regulation by the parasitoid and bottom-up regulation driven by resource degradation contributed to more than 50 % of host and parasitoid population responses to temperature variation.5. Our results demonstrate that environmental degradation can strongly affect how species in a trophic interaction respond to short-term temperature fluctuations through direct and indirect trait-mediated effects. The effects are driven by species differences in sensitivity to environmental conditions and modulate top-down (parasitism) and bottom-up (resource) regulation. This study highlights the need to account for differences in the sensitivity of species’ traits to environmental stressors to understand how interacting species will respond to simultaneous anthropogenic changes. Journal Article Journal of Animal Ecology 88 11 0021-8790 1365-2656 climate change, environmental variation, habitat modification, host-parasitoid, life history trajectories, phenological mismatch, population cycles, population dynamics 31 12 2019 2019-12-31 10.1111/1365-2656.13069 COLLEGE NANME Biosciences Geography and Physics School COLLEGE CODE BGPS Swansea University RCUK/NERC 2020-06-26T17:46:41.7764790 2019-06-04T10:18:20.0998610 Marianne Mugabo 1 David Gilljam 2 Laura Petteway 3 Chenggui Yuan 4 Mike Fowler 0000-0003-1544-0407 5 Steven M. Sait 6 0050631-05092019152416.pdf 50631.pdf 2019-09-05T15:24:16.7170000 Output 1840998 application/pdf Version of Record true 2019-09-05T00:00:00.0000000 This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited true eng
title Environmental degradation amplifies species' responses to temperature variation in a trophic interaction
spellingShingle Environmental degradation amplifies species' responses to temperature variation in a trophic interaction
Mike Fowler
title_short Environmental degradation amplifies species' responses to temperature variation in a trophic interaction
title_full Environmental degradation amplifies species' responses to temperature variation in a trophic interaction
title_fullStr Environmental degradation amplifies species' responses to temperature variation in a trophic interaction
title_full_unstemmed Environmental degradation amplifies species' responses to temperature variation in a trophic interaction
title_sort Environmental degradation amplifies species' responses to temperature variation in a trophic interaction
author_id_str_mv a3a29027498d4b43a3f082a0a5ba16b4
author_id_fullname_str_mv a3a29027498d4b43a3f082a0a5ba16b4_***_Mike Fowler
author Mike Fowler
author2 Marianne Mugabo
David Gilljam
Laura Petteway
Chenggui Yuan
Mike Fowler
Steven M. Sait
format Journal article
container_title Journal of Animal Ecology
container_volume 88
container_issue 11
publishDate 2019
institution Swansea University
issn 0021-8790
1365-2656
doi_str_mv 10.1111/1365-2656.13069
document_store_str 1
active_str 0
description 1. Land-use and climate change are two of the primary drivers of the current biodiversity crisis. However, we lack understanding of how single-species and multi-species associations are affected by interactions between multiple environmental stressors.2. We address this gap by examining how environmental degradation interacts with daily stochastic temperature variation to affect individual life history and population dynamics in a host-parasitoid trophic interaction, using the Indian meal moth, Plodia interpunctella, and its parasitoid wasp Venturia canescens. 3. We carried out a single generation individual life history experiment and a multi-generation microcosm experiment during which individuals and microcosms were maintained at a mean temperature of 26 ºC that was either kept constant or varied stochastically, at four levels of host resource degradation, in the presence or absence of parasitoids.4. At the individual level, resource degradation increased juvenile development time and decreased adult body size in both species. Parasitoids were more sensitive to temperature variation than their hosts, with a shorter juvenile stage duration than in constant temperatures and a longer adult lifespan in moderately degraded environments. Resource degradation also altered the host’s response to temperature variation, leading to a longer juvenile development time at high resource degradation. At the population level, moderate resource degradation amplified the effects of temperature variation on host and parasitoid populations compared to no or high resource degradation and parasitoid overall abundance was lower in fluctuating temperatures. Top-down regulation by the parasitoid and bottom-up regulation driven by resource degradation contributed to more than 50 % of host and parasitoid population responses to temperature variation.5. Our results demonstrate that environmental degradation can strongly affect how species in a trophic interaction respond to short-term temperature fluctuations through direct and indirect trait-mediated effects. The effects are driven by species differences in sensitivity to environmental conditions and modulate top-down (parasitism) and bottom-up (resource) regulation. This study highlights the need to account for differences in the sensitivity of species’ traits to environmental stressors to understand how interacting species will respond to simultaneous anthropogenic changes.
published_date 2019-12-31T19:44:39Z
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