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Population Structure and Dynamics of the Clonal Alga Mazzaella cornucopiae (Rhodophyta, Gigartinaceae) from Barkley Sound, Pacific Coast of Canada

Population Structure and Dynamics of the Clonal Alga Mazzaella cornucopiae (Rhodophyta,... Introduction R. Scrosati parts (clonal fragments sensu Eriksson and Jerling 1990) as a result of some kind of disturbance. The two independent-life reproductive phases of M. cornucopiae, gametophytes and tetrasporophytes, are isomorphic, so they can only be differentiated visually when their fronds are reproductive. This paper firstly describes the annual dynamics of the population of Mazzaella cornucopias from Prasiola Point, based on a 2-year study. The periods of growth, senescence, and reproduction were identified based on a regular measurement of total thallus cover, frond density and length, stand biomass, and density of reproductive fronds. Results are compared with the dynamics of other members of the Gigartinaceae, discussing the patterns that are general for this group and those that are species- or site-specific. The regular mapping of thalli permitted an estimation of the relative role of perennating holdfasts and of spores to the persistence of the population. The ratio between gametophytes and tetrasporophytes (G: T ratio) is an important descriptor of population structure and it may vary depending on species, seasons, or site conditions for members of the Gigartinaceae (Craigie and Pringle 1978, Dyck et al 1985, Lazo et 1989, Luxoro and Santelices 1989, DeWreede and Green 1990, Phillips http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Botanica Marina de Gruyter

Population Structure and Dynamics of the Clonal Alga Mazzaella cornucopiae (Rhodophyta, Gigartinaceae) from Barkley Sound, Pacific Coast of Canada

Scrosati, Ricardo
Botanica Marina , Volume 41 (1-6) – Jan 1, 1998
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References (28)

Publisher
de Gruyter
Copyright
Copyright © 2009 Walter de Gruyter
ISSN
0006-8055
eISSN
1437-4323
DOI
10.1515/botm.1998.41.1-6.483
Publisher site
See Article on Publisher Site

Abstract

Introduction R. Scrosati parts (clonal fragments sensu Eriksson and Jerling 1990) as a result of some kind of disturbance. The two independent-life reproductive phases of M. cornucopiae, gametophytes and tetrasporophytes, are isomorphic, so they can only be differentiated visually when their fronds are reproductive. This paper firstly describes the annual dynamics of the population of Mazzaella cornucopias from Prasiola Point, based on a 2-year study. The periods of growth, senescence, and reproduction were identified based on a regular measurement of total thallus cover, frond density and length, stand biomass, and density of reproductive fronds. Results are compared with the dynamics of other members of the Gigartinaceae, discussing the patterns that are general for this group and those that are species- or site-specific. The regular mapping of thalli permitted an estimation of the relative role of perennating holdfasts and of spores to the persistence of the population. The ratio between gametophytes and tetrasporophytes (G: T ratio) is an important descriptor of population structure and it may vary depending on species, seasons, or site conditions for members of the Gigartinaceae (Craigie and Pringle 1978, Dyck et al 1985, Lazo et 1989, Luxoro and Santelices 1989, DeWreede and Green 1990, Phillips

Journal

Botanica Marina – de Gruyter

Published: Jan 1, 1998

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