Climate warming and heat waves affect reproductive strategies and interactions between submerged macrophytes

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Climate warming and heat waves affect reproductive strategies and interactions between submerged macrophytes. / Li, Zhongqiang; He, Liang; Zhang, Huan; Urrutia-Cordero, Pablo; Ekvall, Mattias K.; Hollander, Johan; Hansson, Lars Anders.

In: Global Change Biology, Vol. 23, No. 1, 01.01.2017, p. 108-116.

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Li, Zhongqiang ; He, Liang ; Zhang, Huan ; Urrutia-Cordero, Pablo ; Ekvall, Mattias K. ; Hollander, Johan ; Hansson, Lars Anders. / Climate warming and heat waves affect reproductive strategies and interactions between submerged macrophytes. In: Global Change Biology. 2017 ; Vol. 23, No. 1. pp. 108-116.

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TY - JOUR

T1 - Climate warming and heat waves affect reproductive strategies and interactions between submerged macrophytes

AU - Li, Zhongqiang

AU - He, Liang

AU - Zhang, Huan

AU - Urrutia-Cordero, Pablo

AU - Ekvall, Mattias K.

AU - Hollander, Johan

AU - Hansson, Lars Anders

PY - 2017/1/1

Y1 - 2017/1/1

N2 - Extreme climatic events, such as heat waves, are predicted to increase in frequency and intensity during the next hundred years, which may accelerate shifts in hydrological regimes and submerged macrophyte composition in freshwater ecosystems. Since macrophytes are profound components of aquatic systems, predicting their response to extreme climatic events is crucial for implementation of climate change adaptation strategies. We therefore performed an experiment in 24 outdoor enclosures (400 L) separating the impact of a 4 °C increase in mean temperature with the same increase, that is the same total amount of energy input, but resembling a climate scenario with extreme variability, oscillating between 0 °C and 8 °C above present conditions. We show that at the moderate nutrient conditions provided in our study, neither an increase in mean temperature nor heat waves lead to a shift from a plant-dominated to an algal-dominated system. Instead, we show that species-specific responses to climate change among submerged macrophytes may critically influence species composition and thereby ecosystem functioning. Our results also imply that more fluctuating temperatures affect the number of flowers produced per plant leading to less sexual reproduction. Our findings therefore suggest that predicted alterations in climate regimes may influence both plant interactions and reproductive strategies, which have the potential to inflict changes in biodiversity, community structure and ecosystem functioning.

AB - Extreme climatic events, such as heat waves, are predicted to increase in frequency and intensity during the next hundred years, which may accelerate shifts in hydrological regimes and submerged macrophyte composition in freshwater ecosystems. Since macrophytes are profound components of aquatic systems, predicting their response to extreme climatic events is crucial for implementation of climate change adaptation strategies. We therefore performed an experiment in 24 outdoor enclosures (400 L) separating the impact of a 4 °C increase in mean temperature with the same increase, that is the same total amount of energy input, but resembling a climate scenario with extreme variability, oscillating between 0 °C and 8 °C above present conditions. We show that at the moderate nutrient conditions provided in our study, neither an increase in mean temperature nor heat waves lead to a shift from a plant-dominated to an algal-dominated system. Instead, we show that species-specific responses to climate change among submerged macrophytes may critically influence species composition and thereby ecosystem functioning. Our results also imply that more fluctuating temperatures affect the number of flowers produced per plant leading to less sexual reproduction. Our findings therefore suggest that predicted alterations in climate regimes may influence both plant interactions and reproductive strategies, which have the potential to inflict changes in biodiversity, community structure and ecosystem functioning.

KW - aquatic systems

KW - climate change

KW - community dynamic

KW - heat waves

KW - sexual reproduction

KW - submerged macrophytes

UR - http://www.scopus.com/inward/record.url?scp=84992650314&partnerID=8YFLogxK

U2 - 10.1111/gcb.13405

DO - 10.1111/gcb.13405

M3 - Article

VL - 23

SP - 108

EP - 116

JO - Global Change Biology

T2 - Global Change Biology

JF - Global Change Biology

SN - 1354-1013

IS - 1

ER -