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Permanent link (DOI): https://doi.org/10.7939/R39Z90Q23

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Respiration and Excurrent Velocity DATA for 5 demosponges - Data associated with: Ludeman, Reidenbach and Leys, JEB 2017 The energetic cost of filtration by demosponges and their behavioural response to ambient currents Open Access

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Author or creator
Sally Leys
Additional contributors
Danielle Ludeman
Matthew Reidenbach
Subject/Keyword
Porifera
Filtration
Ecophysiology
Demosponges
Sponge
Energetics
Type of item
Dataset
Language
English
Place
Time
Description
Abstract: Sponges (Porifera) are abundant in most marine and freshwater ecosystems and as suspension feeders they play a crucial role in filtering the water column. Their active pumping enables them to filter up to 900 times their body volume of water per hour, recycling nutrients and coupling a pelagic food supply with benthic communities. Despite the ecological importance of sponge filter feeding, little is known about how sponges control the water flow through their canal system or how much energy it costs to filter the water. Sponges have long been considered textbook examples of animals that use current-induced flow. We provide evidence that suggests that some species of demosponge do not use current-induced flow, rather they respond behaviourally to increased ambient currents by reducing the volume of water filtered. Using a morphometric model of the canal system, we also show that filter feeding may be more energetically costly than previously thought. Measurements of volumetric flow rates and oxygen removal in five species of demosponge show that pumping rates are variable within and between species, with more oxygen consumed the greater the volume filtered. Together these data suggest that sponges have active control over the volume of water they process, which may be an adaptation to reduce the energetic cost of filtration in times of high stress.
Date created
2017/02/14
DOI
doi:10.7939/R39Z90Q23
License information
Attribution-NonCommercial-NoDerivs 4.0 International
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Citation for previous publication
Published by The Company of Biologists Ltd | Journal of Experimental Biology (2017) 0, 1-13 doi:10.1242/jeb.146076
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