Quantitative morphometric analysis of morphologically similar species of Fragilaria (Fragilariaceae, Bacillariophyta) allows detection of non-indigenous taxa: a case study from Lake Ladoga (North of European Russia)

Rusanov, A.G.; Gololobova, M.A.; Kolobov, M.Y.; Duleba, M.; Georgiev, A.A.; Grigorszky, I.; Kiss, K.T.; Ács, É.; Somlyai, I.

Авторы: Rusanov A.G., Gololobova M.A., Kolobov M.Y., Duleba M., Georgiev A.A., Grigorszky I., Kiss K.T., Ács É., Somlyai I.
Журнал: Water
Том: 15
Номер: 22
Год издания: 2023
Издательство: MDPI Publishing
Местоположение издательства: Basel, Switzerland, Switzerland
Первая страница: 3994
DOI: 10.3390/w15223994
Аннотация: In Lake Ladoga (northwestern Russia), we found a diatom, putatively Fragilaria sublanceolatabaikali, an endemic species from Lake Baikal (southeastern Siberia, Russia). To determine whetherthis population matches a previously recognized species from Lake Baikal and assess how it differsfrom other similar Fragilaria taxa, we studied the valve morphology of three morphologically similarFragilaria populations (the putative F. sublanceolata-baikali, F. pectinalis and F. perminuta) sampled inLake Ladoga, along with a population of F. sublanceolata-baikali sampled in Lake Baikal. We used lightand scanning electron microscopy with a combination of traditional and geometric morphometricmethods. To analyze covariation between the valve shape and size (i.e., allometry), we examineddifferences in the ontogenetic–allometric trajectories at both the interspecific and intraspecific levels.In addition, the effect of size correction of the valve shape on species differentiation was tested.Traditional morphometrics revealed that F. sublanceolata-baikali is distinguished from F. pectinalis andF. perminuta by valve length, while F. pectinalis and F. perminuta are distinguished by striae density.All three species of Fragilaria showed separate and parallel allometric trajectories. In contrast, thetwo populations of F. sublanceolata-baikali were on a common allometric trajectory, indicating theconspecificity between these populations. Prior to allometric correction, geometric morphometricswas not able fully discriminate between the three Fragilaria species. After allometric correction, thethree Fragilaria species were clearly separated in a size-corrected morphospace, whereas the twopopulations of F. sublanceolata-baikali formed a tightly overlapping group. Thus, we conclude thatgeometric morphometrics can reliably distinguish between these morphologically similar species ofFragilaria, but only after accounting for allometric shape variation. Our study confirmed morphological similarity between the two geographically distant populations of F. sublanceolata-baikali, whichindicates that this taxon can be considered as invasive in Lake Ladoga.
Добавил в систему: Гололобова Мария Александровна

	ИСТИНА	Войти в систему Регистрация
	ИСТИНА ЦЭМИ РАН
	Главная Поиск Статистика О проекте Помощь

ИСТИНА

ИСТИНА ЦЭМИ РАН

Quantitative morphometric analysis of morphologically similar species of Fragilaria (Fragilariaceae, Bacillariophyta) allows detection of non-indigenous taxa: a case study from Lake Ladoga (North of European Russia)статья Исследовательская статья

Прикрепленные файлы