SEDIMENT ROUGHNESS AND MOISTURE AS KEY FACTORS FOR STREAM
BENTHIC MACROINVERTEBRATES RESISTANCE DURING THE DROUGHT PERIOD

a 2017

SEDIMENT ROUGHNESS AND MOISTURE AS KEY FACTORS FOR STREAM BENTHIC MACROINVERTEBRATES RESISTANCE DURING THE DROUGHT PERIOD

LOSKOTOVÁ, Barbora, Michal STRAKA a Petr PAŘIL

Základní údaje

Originální název

SEDIMENT ROUGHNESS AND MOISTURE AS KEY FACTORS FOR STREAM BENTHIC MACROINVERTEBRATES RESISTANCE DURING THE DROUGHT PERIOD

Autoři

LOSKOTOVÁ, Barbora (203 Česká republika, garant, domácí), Michal STRAKA (203 Česká republika, domácí) a Petr PAŘIL (203 Česká republika)

Vydání

Abstract book SEFS 2017, Olomouc July 2-7, 2017, 2017

Další údaje

Jazyk

angličtina

Typ výsledku

Konferenční abstrakt

Obor

10600 1.6 Biological sciences

Stát vydavatele

Česká republika

Utajení

není předmětem státního či obchodního tajemství

Kód RIV

RIV/00216224:14310/17:00097154

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

sediment porosity; hyporheic refugia; drying

Změněno: 12. 7. 2017 19:16, doc. RNDr. Petr Pařil, Ph.D.

Anotace

V originále

Hydrological regime of many small streams is significantly altered by human activities or climate change, which can result in a complete dry-out mostly during the summer season. While some of the taxa do not survive, other can resist the disturbance within wet streambed. Macroinvertebrate taxa that are able to penetrate into wet substrate or have specific adaptations for resistance in wet stream bed can survive on a site impacted by drought. The key factors affecting taxa survival is substrate roughness and its moisture. Desiccation resistance of selected (model) macroinvertebrate taxa (Gammarus fossarum, Ephemera danica, Baetis sp., Pisidium sp. and Oligochaeta (mixture of Limnodrilus/Tubifex sp.) was tested in a laboratory experiment. The main aim of the study was to test the ability of the taxa to penetrate the substrate and the length of their possible survival there. We used three substrate types with different grain size (2-4 mm, 7-10 mm and 20-32 mm), under 7 cm layer of the substrate there was 3 cm layer of permanently watered sand that simulated aquatic refugium (hyporheal). We made five subsequent controls during a period of 32 days from the beginning of the experiment. Soil moisture, air temperature and humidity were measured during the experiment. Aquatic Oligochaetes and Pisidium sp. showed the best ability to get into wet substrate and survive there for a long period. On the contrary, Baetis sp. could not survive even in wet refugium. G. fossarum and E. danica revealed various abilities depending on the substrate type.

Návaznosti

LTC17017, interní kód MU

Název: Validace bioindikačních metod jako nástrojů pro udržitelný management středoevropských vysychavých toků a přenos těchto metod do praxe (Akronym: InterStreaM)

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, Validace bioindikačních metod jako nástrojů pro udržitelný management středoevropských vysychavých toků a přenos těchto metod do praxe, INTER-COST

Citovat

LOSKOTOVÁ, Barbora, Michal STRAKA a Petr PAŘIL. SEDIMENT ROUGHNESS AND MOISTURE AS KEY FACTORS FOR STREAM BENTHIC MACROINVERTEBRATES RESISTANCE DURING THE DROUGHT PERIOD. In Abstract book SEFS 2017, Olomouc July 2-7, 2017. 2017.

@proceedings{1385160,
   author = {Loskotová, Barbora and Straka, Michal and Pařil, Petr},
   booktitle = {Abstract book SEFS 2017, Olomouc July 2-7, 2017},
   keywords = {sediment porosity; hyporheic refugia; drying},
   language = {eng},
   title = {SEDIMENT ROUGHNESS AND MOISTURE AS KEY FACTORS FOR STREAM BENTHIC MACROINVERTEBRATES RESISTANCE DURING THE DROUGHT PERIOD},
   year = {2017}
}

TY  - CONF
ID  - 1385160
AU  - Loskotová, Barbora - Straka, Michal - Pařil, Petr
PY  - 2017
TI  - SEDIMENT ROUGHNESS AND MOISTURE AS KEY FACTORS FOR STREAM BENTHIC MACROINVERTEBRATES RESISTANCE DURING THE DROUGHT PERIOD
KW  - sediment porosity
KW  - hyporheic refugia
KW  - drying
N2  - Hydrological regime of many small streams is significantly altered by human activities or climate change, which can result in a complete dry-out mostly during the summer season. While some of the taxa do not survive, other can resist the disturbance within wet streambed. Macroinvertebrate taxa that are able to penetrate into wet substrate or have specific adaptations for resistance in wet stream bed can survive on a site impacted by drought. The key factors affecting taxa survival is substrate roughness and its moisture. Desiccation resistance of selected (model) macroinvertebrate taxa (Gammarus fossarum, Ephemera danica, Baetis sp., Pisidium sp. and Oligochaeta (mixture of Limnodrilus/Tubifex sp.) was tested in a laboratory experiment. The main aim of the study was to test the ability of the taxa to penetrate the substrate and the length of their possible survival there. We used three substrate types with different grain size (2-4 mm, 7-10 mm and 20-32 mm), under 7 cm layer of the substrate there was 3 cm layer of permanently watered sand that simulated aquatic refugium (hyporheal). We made five subsequent controls during a period of 32 days from the beginning of the experiment. Soil moisture, air temperature and humidity were measured during the experiment. Aquatic Oligochaetes and Pisidium sp. showed the best ability to get into wet substrate and survive there for a long period. On the contrary, Baetis sp. could not survive even in wet refugium. G. fossarum and E. danica revealed various abilities depending on the substrate type.
ER  -

LOSKOTOVÁ, Barbora, Michal STRAKA a Petr PAŘIL. SEDIMENT ROUGHNESS AND MOISTURE AS KEY FACTORS FOR STREAM BENTHIC MACROINVERTEBRATES RESISTANCE DURING THE DROUGHT PERIOD. In \textit{Abstract book SEFS 2017, Olomouc July 2-7, 2017}. 2017.

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