The seaweeds of Kenya: Checklist, history of seaweed study, coastal environment, and analysis of seaweed diversity and biogeography

Bolton, John J.; Oyieke, H; Gwada, P.

doi:10.1016/j.sajb.2006.08.006

Cited by 40 publications

(22 citation statements)

References 36 publications

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“…The results revealed that the relatively low number of brown algae in the Northern Samar flora is in agreement with other findings which demonstrated that the proportion of species of brown algae in a seaweed flora is low in tropical regions on a global scale (Bolton, 2012). A higher proportion of green algae collected in Northern Samar is similar to many tropical floras of other countries (Ryan, 2012 Among the 39 species of seaweeds collected in different coastal towns in Northern Samar, Hydroclathrusclathratus species is present in all sampling sites.…”

Section: Resultssupporting

confidence: 92%

“…The crude protein content (N X 4.38)of the samples was estimated by the macro Kjeldahl method, the fat was determined by extracting a known weight of powdered seaweeds using a Soxhlet apparatus, the ash content was determined by gravimetric analysis and the total carbohydrates content were quantified using spectrophotometer at 490 nm (Bolton, 2012).…”

Section: Nutrient Composition Analysis Of Seaweedsmentioning

confidence: 99%

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Study on Nutritional and Elemental Analysis of the Seaweeds of Northern Samar, Philipines

Cui-Lim

Ambida

Alvarez

et al. 2017

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The purpose of the study: In this work, the nutritional and elemental analysis of seaweeds in Northern Samar is analyzed. Methodology:The seaweeds of Northern Samar are collected from intertidal zone, and it was brought back to the College of Science for taxonomic identity. The nutritional and elemental content of the seaweeds were determined Main findings: Based on the results obtained a total of 39 species belonging to eighteen (18) families of seaweeds were recorded from different coastal towns in Northern Samar, Philippines. The results revealed that for seaweeds with the economic value the nutritional and elemental content is comparable to the unknown seaweeds with no economic value. Implications:The results of bioavailability of nutrients of this study might be the basis that unknown seaweeds with no economic value can be used directly in the diet and promote health advantage.Originality/Novelty of study: The seaweeds of Northern Samar are not properly documented in comparison with other marine flora. The results demonstrated that some species of seaweeds collected in Northern Samar with no economic value could also accumulate non-essential elements. Further studies would surely be a great contribution to our local food and pharmaceutical industries.

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Section: Resultssupporting

confidence: 92%

Section: Nutrient Composition Analysis Of Seaweedsmentioning

confidence: 99%

Study on Nutritional and Elemental Analysis of the Seaweeds of Northern Samar, Philipines

Cui-Lim

Ambida

Alvarez

et al. 2017

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“…Algaebase gives distributions on a country basis, which is very detailed in the context of a global analysis, and has been used a number of times for sources of seaweed biogeographical data in the literature (e.g. Andreakis et al 2007;Bolton et al 2007). Firstly, the accepted genera with the numbers of currently accepted species in each genus are presented, tabulated in the seven families within the Laminariales accepted in this contribution.…”

Section: Postelsia Palmaeformismentioning

confidence: 99%

The biogeography of kelps (Laminariales, Phaeophyceae): a global analysis with new insights from recent advances in molecular phylogenetics

2010

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Despite their ecological and economic importance, no summary of kelp global biogeography has been produced for almost two decades. The circumscription of the order Laminariales and familial and generic relationships in the group have changed considerably recently, in the light of molecular data. A global summary and geographical analysis of kelp species and their distributions (112 species in 33 genera) is presented. These data are analysed and discussed from the perspective of the new consensus of relationships within the group, and likely evolutionary events. The putative ancestors of the kelps occur and are overwhelmingly most diverse, in the cooler waters of northern Japan. The biogeographical evidence suggests three main lines of subsequent evolution: (a) a diversiWcation producing the four 'derived' families Alariaceae, Costariceae, Laminariaceae, and Lessoniaceae and most extant genera in the temperate northern PaciWc, probably during the Miocene. (b) The evolution of an Arctic Xora which invaded the North Atlantic following the opening of the Bering Strait ca. 5.5 Ma. (c) At least four separate crossings, by diVerent genera, of tropical regions from Northern to Southern Hemisphere (and one in the opposite direction). The recorded impacts of man on these distributions have thus far been minimal, with the notable exceptions of Undaria pinnatiWda and species of Saccharina (grown in aquaculture systems for human food). Most genera are monospeciWc, with many conWned to either the western or eastern temperate North PaciWc, whereas the distribution of the most species-rich genera (Alaria, Laminaria, Saccharina) includes the Arctic, and they are widespread in the North Atlantic. This rapid species-level evolution is hypothesised to have been promoted by the relatively recent invasion of the Atlantic by these taxa. The crossing of the tropics has occurred in warm-temperate species some of which occur and are sometimes abundant, in deeper water in today's tropics, refuting the widespread view that kelps are only present in cold-water habitats. Most of these Southern Hemisphere kelps are in the family Lessoniaceae, including the only genus not present in the Northern Hemisphere, Lessonia. The origins of this genus are unclear. Knowledge of the phylogeography of the Ecklonia/Eisenia complex is particularly important in understanding Southern Hemisphere kelp biogeography. A number of groups are undergoing active speciation and, with the lack of a consistent species concept, the species-level taxonomy of the group remains to be clariWed. There is a great need for molecular phylogeographical studies to provide evidence for many of the hypotheses presented here based on distributional evidence and the currently accepted taxonomic framework.

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“…This brings the total number of species recorded from Angola to 169. For a seaweed flora of a 1 000 km-long, tropical coast, this is not a large total: Kenya, in East Africa, has a coast half as long but with 386 species of seaweeds (Bolton et al 2007) and Tanzania is reported to have 428 species . However, the marine fauna and flora of Tropical West Africa are known to be relatively impoverished in comparison to those of most tropical regions.…”

Section: Species Diversity and Compositionmentioning

confidence: 99%

The seaweeds of Angola: the transition between tropical and temperate marine floras on the west coast of southern Africa

Anderson

Bolton

Smit

et al. 2012

African Journal of Marine Science

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The seaweed flora of Angola is relatively poorly known. Most of the 124 records listed for the country come from a 1974 British Natural History Museum expedition to the central and southern parts of that country. Previous biogeographic studies treated the Angolan seaweed flora as a whole and grouped it with those of certain West African islands as transitional between a Tropical West African seaweed flora (essentially extending from Senegal to Gabon) and temperate floras to the north and south of this truly tropical region. In the present study a total of 99 species and subspecies of seaweeds was collected from the intertidal zone and shallow sublittoral zones at five sites in the north of Angola and four sites in the south. The biogeographic distributions of our records were examined and compared with the temperate flora of Namibia to the south and the flora of Ghana to the north (as an example of a well-studied Tropical West African flora). Multivariate analyses of our presence/absence records showed differences between northern and southern sites (cluster analysis [Jaccard, average linkage] and detrended correspondence analysis). All Angolan sites were clearly different from floras of south, central and northern Namibia, which are considered to be strictly temperate in nature. Northern Angolan sites grouped more closely with Ghana than with southern Angolan sites. Distribution patterns within Angola are discussed in relation to monthly sea surface temperature data that were processed for this region. We conclude that the overall affinities of the Angolan seaweed flora, as represented by our collections, are Tropical West African, but with a well-developed temperate element in southern Angola (from about 13° S) comprising mainly cooler-water species from the Benguela Marine Province of Namibia and western South Africa. Our collections add about 45 species to the Angolan seaweed flora, raising the total number of species to around 169. This total approaches that of Ghana which, with about 200 species, is considered to have the richest seaweed flora in Tropical West Africa.

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The seaweeds of Kenya: Checklist, history of seaweed study, coastal environment, and analysis of seaweed diversity and biogeography

Cited by 40 publications

References 36 publications

Study on Nutritional and Elemental Analysis of the Seaweeds of Northern Samar, Philipines

Study on Nutritional and Elemental Analysis of the Seaweeds of Northern Samar, Philipines

The biogeography of kelps (Laminariales, Phaeophyceae): a global analysis with new insights from recent advances in molecular phylogenetics

The seaweeds of Angola: the transition between tropical and temperate marine floras on the west coast of southern Africa

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