Abstract

Lake OlBolossat, an important wetland in Central Kenya highland currently threatened by anthropogenic activities. In order to conserve biodiversity in this Lake Ecosystem and associated habitats understanding abundance and diversity of different taxa is needed. This study documented macro-fungi diversity of Lake Ol Bolossat basin and its associated riparian ecosystems. The survey revealed 35 macrofungi species distributed across 21 families. Species in family Polyporaceae and Agaricaceae (mainly the puffball) dominated the Lake ecosystems. Woodrotters species (50%) dominated the ecosystem followed by ectomycorrhiza (17%) and cow-dung dwellers (15%). Termite cultivated species and soil dwellers had the lowest representation (9%). Macro-fungi density, species richness and diversity was significantly low in natural grassland and forest remnants compared to introduced and exotic woodlots. Only three species of macrofungi (<i>Termitomyces microcarpus</i>, <i>Ramariopsis kunzei</i> and <i>Datronia mollis</i>) were documented in natural forests remnants. Natural grassland around the lake was mainly dominated by <i>Termitomyces, Lycoperdon</i>, <i>Panaeolus</i> (cowdung), <i>Psilocybe</i> and <i>Agrocybe</i> species (cowdung). Ectomycorrhiza species (<i>Laccaria bicolor, Pisolithus arrhizus, Suillus granulatus, Scleroderma citrinum</i>) dominated introduced and exotic <i>Eucalyptus, Pinus </i>and<i> Acacia mearnsii</i> plantation. This study has revealed wide range of macro-fungi community in Lake Ol Bolossat basin, and adverse effect of degradation on native macro-fungi community. The negative implication of losing macrofungi diversity along Lake OlBolossat ecosystem is discussed.

Highlights

  • Lake Ol Bolossat is an important wetland in Central Kenya occurring in Nyandarua County with both salty and freshwater

  • Our results revealed high diversity of macrofungi in introduced-exotic trees woodlots compared to natural grassland and forested ecosystems

  • We recommend a detailed study in remaining natural forested and grassland ecosystems to reveal macro-fungi community that may have not sprouted during the current sampling period

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Summary

Introduction

Lake Ol Bolossat is an important wetland in Central Kenya occurring in Nyandarua County with both salty and freshwater. The lake lies at average altitude of 2340 metres above the sea level making it highest altitude lake in East Africa and an important stopover for migratory birds from Australia, Europe and Egypt It serves the Ewaso Nyiro River catchment which supports human communities, wildlife and livestock in Samburu, Isiolo, Laikipia and Garissa counties. Deforestation and cultivation of floodplains has in return increased levels of land degradation evidenced by high levels of soil erosion, overgrazing, burning and encroachment onto riparian and forest reserved [1]. This has negatively influenced to Lake primary productivity and ecosystem services accrued.

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