A comparison of specific growth rates of periphytic diatoms of varying cell size under laboratory and field conditions
Abstract
Diatom species grown under non-limiting nutrient availability in multispecific biofilms were sampled from glass substrates immersed in the field and in experimental freshwater microcosms, and their growth responses were determined. The major species that developed on the substrates were common to both experiments and the specific growth rates (k) ranged from 0.06 to 0.41divisionday−1. An inverse relationship between k and cell sizes was observed, which is in accordance with allometry results reported by several authors. Although found in lower amounts, the large, slow-growing species accounted significantly in total community biovolume, underlying their significance for ecological purposes. From growth characteristics data, life history strategies were drawn for the dominant species recorded, from small pioneer species to large taxa that are more favoured by high resource supply. Kinetic data measured in both laboratory and insitu experiments stressed that the difficulties to mimic the field in laboratory experiments may have a strong impact on growth kinetics.
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BibTeX
@article{morin2026comparison,
title = {{A comparison of specific growth rates of periphytic diatoms of varying cell size under laboratory and field conditions}},
author = {Soizic Morin and Michel Coste and François Delmas},
journal = {Hydrobiologia},
year = {2026},
month = oct,
doi = {10.1007/s10750-008-9513-y},
url = {https://hal.inrae.fr/hal-02590991v1},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - JOUR
TI - A comparison of specific growth rates of periphytic diatoms of varying cell size under laboratory and field conditions
AU - Soizic Morin
AU - Michel Coste
AU - François Delmas
PY - 2026
DA - 2026/10/23
JO - Hydrobiologia
DO - 10.1007/s10750-008-9513-y
UR - https://hal.inrae.fr/hal-02590991v1
AB - Diatom species grown under non-limiting nutrient availability in multispecific biofilms were sampled from glass substrates immersed in the field and in experimental freshwater microcosms, and their growth responses were determined. The major species that developed on the substrates were common to both experiments and the specific growth rates (k) ranged from 0.06 to 0.41divisionday−1. An inverse relationship between k and cell sizes was observed, which is in accordance with allometry results reported by several authors. Although found in lower amounts, the large, slow-growing species accounted significantly in total community biovolume, underlying their significance for ecological purposes. From growth characteristics data, life history strategies were drawn for the dominant species recorded, from small pioneer species to large taxa that are more favoured by high resource supply. Kinetic data measured in both laboratory and insitu experiments stressed that the difficulties to mimic the field in laboratory experiments may have a strong impact on growth kinetics.
SN - 0018-8158
SN - 1573-5117
ER -