Competition Studies of Marine Macroalgae in Laboratory Culture

Maggs, Christine A.; Cheney, Donald P.

doi:10.1111/j.0022-3646.1990.00018.x

Cited by 53 publications

(34 citation statements)

References 32 publications

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“…Although interspecific coalescence has been reported from laboratory cultures of 2 Gracilaria species (Maggs & Cheney 1990), we found that coalescence occurred only among conspecific partners in the field. Contact between interspecific partners produced tissue destruction at the contacting borders of the 2 crusts, as attested by thick necrotic tissues composed of crushed cells and cell-wall remains of both species.…”

Section: Discussioncontrasting

confidence: 73%

“…A first step in evaluating the relative importance of coalescence is to determine whether the process occurs among well-established clumps in the field and whether it is restricted to conspecific partners or also includes interspecific fusions. While most previous studies have described intraspecific coalescence, a recent study by Maggs & Cheney (1990) described successful coalescence in mixed spore cultures of 2 different species of Gracilaria.…”

Section: Introductionmentioning

confidence: 99%

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Field testing of inter- and intraspecific coalescence among mid-intertidal red algae

Santelices¹,

Aedo²,

Hormazábal³

et al. 2003

Mar. Ecol. Prog. Ser.

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Although spores, sporelings and juveniles of many ecologically important and competitively dominant seaweed species inhabiting intertidal and shallow subtidal habitats may coalesce, it is unknown whether coalescence among holdfasts of well-established clumps occurs naturally in the field. Using a combination of field and ultrastructural studies, we evaluate if inter-and intraspecific coalescence occurs between clumps of Mazzaella laminarioides and Nothogenia fastigiata and, if so, whether such a process modifies clump shapes and sizes. Interspecific encounters always resulted in cell compression and destruction of the contacting tissues and in the eventual mortality of 1 of the partners (in this case N. fastigiata). In contrast, intraspecific encounters in both species always resulted in coalescence. In these field populations, coalescence seems to be frequent and dynamic and is probably modulated by other community structuring mechanisms such as grazing, abiotic extremes, and mussel recruitment. This field demonstration of coalescence suggests that many intertidal and subtidal populations of coalescing Rhodophyta might be chimeric.

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Section: Discussioncontrasting

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Field testing of inter- and intraspecific coalescence among mid-intertidal red algae

Santelices¹,

Aedo²,

Hormazábal³

et al. 2003

Mar. Ecol. Prog. Ser.

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“…In this respect, the copious production of mucilage around Jania spores compared with the smaller quantities around Corallina spores is con- sidered to be related to the epiphytic mode of the former and the requirement for an earlier more rapid establishment on a short lived host. Maggs & Cheney (1990) also suggested that the sticky mucilaginous plug surrounding Chondrus spores probably promoted sporeling coalescence and contributed to the longevity of the plant. As suggested for flagella, it is likely that the successful adhesion of this mucilage, and therefore the spo;e body to the surface, will be determined by aspects of surface compatibility.…”

Section: Initial Attachmentmentioning

confidence: 98%

The settlement, attachment and establishment of marine algal spores

Fletcher¹,

Callow²

1992

British Phycological Journal

250

147

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“…These experiments showed that resource competition can structure simple laboratory 'communities', and that the outcome of competition may change along a nutrient gradient. Competition between species of macroalgae has also been established (Carpenter 1990, Maggs & Cheney 1990, Olson & Lubchenco 1990, Paine 1990. However, few studies address competition between different groups of algae (but see Smith & Horne 1988).…”

Section: Introductionmentioning

confidence: 99%

Competition with macroalgae and benthic cyanobacterial mats limits phytoplankton abundance in experimental microcosms

Fong¹,

Donohoe²,

Zedler³

1993

Mar. Ecol. Prog. Ser.

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Competition for nutrients among estuarine phytoplankton and algal mats (a combination of floating and attached green macroalgae and attached cyanobacterial mats) was studied using replicate expenmental microcosms. At high nutnent loading (nitrate-N = 77 F M d -l ) , the growth of phytoplankton was reduced by a factor of 10 in the presence of the algal mats. Without the algal mats the phytoplankton was very abundant (> 5 X 106 cells rill-l) and dominated by small flagellates, while in the presence of the algal mats the phytoplankton assemblage was sparse and diatoms, flagellates, and unicellular blue-greens were common. The competition hierarchy was cyanobacterial mats >> attached green macroalgae > floating green macroalgae > phytoplankton. When nutrient supply rate was low (nitrate-N = 1.2 pM d-l), the presence of the algal mats shifted the phytoplankton from flagellates to blue-green algae, but did not affect total biomass of the phytoplankton. We conclude that the attached forms of macroalgae as well as the cyanobacterial mats were better competitors for high levels of nutrients than the phytoplankton. This resource competition may explain the negative correlation found in field studes between phytoplankton and macroalgae growing in shallow nutrient-enriched estuaries.

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Competition Studies of Marine Macroalgae in Laboratory Culture

Cited by 53 publications

References 32 publications

Field testing of inter- and intraspecific coalescence among mid-intertidal red algae

Field testing of inter- and intraspecific coalescence among mid-intertidal red algae

The settlement, attachment and establishment of marine algal spores

Competition with macroalgae and benthic cyanobacterial mats limits phytoplankton abundance in experimental microcosms

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