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@article{1484112,
author = {Pařil, Petr and Leigh, Catherine and Polášek, Marek and Sarremejane, Romain and Řezníčková, Pavla and Dostálová, Alena and Stubbington, Rachel},
article_location = {Stuttgart, Germany},
article_number = {1},
doi = {http://dx.doi.org/10.1127/fal/2019/1164},
keywords = {hyporheic zone; intermittent rivers and ephemeral streams; population dynamics; recolonization; refuge; refugium; reproductive diapause; river drying},
language = {eng},
issn = {1863-9135},
journal = {Fundamental and Applied Limnology},
title = {Short-term streambed drying events alter amphipod population structure in a central European stream},
url = {https://www.ingentaconnect.com/content/schweiz/fal/2019/00000193/00000001/art00004},
volume = {193},
year = {2019}
}
TY - JOUR
ID - 1484112
AU - Pařil, Petr - Leigh, Catherine - Polášek, Marek - Sarremejane, Romain - Řezníčková, Pavla - Dostálová, Alena - Stubbington, Rachel
PY - 2019
TI - Short-term streambed drying events alter amphipod population structure in a central European stream
JF - Fundamental and Applied Limnology
VL - 193
IS - 1
SP - 51-64
EP - 51-64
PB - Verlagsbuchhandlung
SN - 18639135
KW - hyporheic zone
KW - intermittent rivers and ephemeral streams
KW - population dynamics
KW - recolonization
KW - refuge
KW - refugium
KW - reproductive diapause
KW - river drying
UR - https://www.ingentaconnect.com/content/schweiz/fal/2019/00000193/00000001/art00004
L2 - https://www.ingentaconnect.com/content/schweiz/fal/2019/00000193/00000001/art00004
N2 - Temporary streams are becoming increasingly common, but ecological responses to streambed drying are poorly characterized in the temperate continental region of central Europe. In addition, global research has focused on community responses to drying, whereas effects on individual populations remain unknown. We explored the population structure of Gammarus fossarum (Crustacea: Amphipoda) in a central European temporary stream. Benthic gammarids were sampled on five dates during a flow recession, one date between two drying events (of 10 and 20 days, respectively), and five dates after flow resumed. Additional benthic samples were taken from isolated pools and dry sediments during drying events, and freeze cores were collected to compare the vertical distribution of amphipods during wet and dry phases. Gammarids were measured, adults distinguished from juveniles, adults sexed, and female reproductive state determined. Densities increased during flow recession, potentially reflecting both a decline in submerged habitat availability and seasonal increases in juvenile abundance. Persistence within dry benthic sediments was minimal, whereas pools and saturated subsurface sediments supported high population densities. Juveniles comprised 80 % of the subsurface population, suggesting that their ability to inhabit small interstices promotes persistence within the dry reach. Juveniles also comprised 92 % of pool inhabitants, despite their potential exposure to predation. Adults dominated after flow resumed, and population structure was altered post-drying by the loss of spring-recruited juveniles and reproductive females. Our results suggest that streambed drying may have longer-term effects than typically characterized by community-level studies. We recommend management actions that support populations of ecologically important species as they adapt to changing flow regimes.
ER -
PAŘIL, Petr, Catherine LEIGH, Marek POLÁŠEK, Romain SARREMEJANE, Pavla ŘEZNÍČKOVÁ, Alena DOSTÁLOVÁ and Rachel STUBBINGTON. Short-term streambed drying events alter amphipod population structure in a central European stream. \textit{Fundamental and Applied Limnology}. Stuttgart, Germany: Verlagsbuchhandlung, vol.~193, No~1, p.~51-64. ISSN~1863-9135. doi:10.1127/fal/2019/1164. 2019.
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