Stream macroinvertebrate community responses to fire: are they the same in different fire-prone biogeographic regions?

2015 ◽  
Vol 34 (4) ◽  
pp. 1527-1541 ◽  
Author(s):  
I. Verkaik ◽  
M. Vila-Escalé ◽  
M. Rieradevall ◽  
C. V. Baxter ◽  
P. S. Lake ◽  
...  
2011 ◽  
Vol 15 (6) ◽  
pp. 1771-1783 ◽  
Author(s):  
J. D. Muehlbauer ◽  
M. W. Doyle ◽  
E. S. Bernhardt

Abstract. Dewatering disturbances are common in aquatic systems and represent a relatively untapped field of disturbance ecology, yet studying dewatering events along gradients in non-dichotomous (i.e. wet/dry) terms is often difficult. Because many stream restorations can essentially be perceived as planned hydrologic manipulations, such systems can make ideal test-cases for understanding processes of hydrological disturbance. In this study we used an experimental drawdown in a 440 ha stream/wetland restoration site to assess aquatic macroinvertebrate community responses to dewatering and subsequent rewetting. The geomorphic nature of the site and the design of the restoration allowed dewatering to occur predictably along a gradient and decoupled the hydrologic response from any geomorphic (i.e. habitat heterogeneity) effects. In the absence of such heterogeneous habitat refugia, reach-scale wetted perimeter and depth conditions exerted a strong control on community structure. The community exhibited an incremental response to dewatering severity over the course of this disturbance, which was made manifest not as a change in community means but as an increase in community variability, or dispersion, at each site. The dewatering also affected inter-species abundance and distributional patterns, as dewatering and rewetting promoted alternate species groups with divergent habitat tolerances. Finally, our results indicate that rapid rewetting – analogous to a hurricane breaking a summer drought – may represent a recovery process rather than an additional disturbance and that such processes, even in newly restored systems, may be rapid.


2019 ◽  
Vol 64 (5) ◽  
pp. 942-953 ◽  
Author(s):  
Leah K. Swartz ◽  
Blake R. Hossack ◽  
Erin Muths ◽  
Robert L. Newell ◽  
Winsor H. Lowe

1994 ◽  
Vol 45 (6) ◽  
pp. 963 ◽  
Author(s):  
IO Growns ◽  
JA Davis

The effects of forestry activities on macroinvertebrate community structure were examined in the headwaters of Carey Brook in the south-west of Australia. The fauna at four sites on an upland stream that ran through a logging coupe were compared, before and after clearfelling, with the fauna at four nearby undisturbed sites. Mean species richness and mean total abundance declined at the treatment sites relative to the control sites after the commencement of clearfelling activities. The composition of the macroinvertebrate fauna in the disturbed stream changed in comparison with that in the undisturbed sites after logging started but returned to the pre-logging composition after winter and spring rains had stopped. The observed changes in the macroinvertebrate fauna occurred during the periods of high loads of suspended inorganic solids at the treatment sites. The possible reasons for the observed results are discussed.


Ecography ◽  
2013 ◽  
Vol 37 (6) ◽  
pp. 599-608 ◽  
Author(s):  
Kaisa-Leena Huttunen ◽  
Heikki Mykrä ◽  
Ari Huusko ◽  
Aki Mäki-Petäys ◽  
Teppo Vehanen ◽  
...  

2013 ◽  
Vol 12 (3) ◽  
pp. 599-618 ◽  
Author(s):  
Ryan A. McManamay ◽  
Donald J. Orth ◽  
Charles A. Dolloff

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