Bonny dumbo - Academia.edu (original) (raw)

Papers by Bonny dumbo

Research paper thumbnail of Survey of Grauer's Gorillas ( Gorilla gorilla graueri ) and Eastern Chimpanzees (Pan troglodytes schweinfurthi) in the Kahuzi-Biega National Park Lowland Sector and Adjacent Forest in Eastern Democratic Republic of Congo

International Journal of Primatology, 1998

We describe the distribution and estimate densities of Grauer's gorillas (Gorilla gorilla gr... more We describe the distribution and estimate densities of Grauer's gorillas (Gorilla gorilla graueri) and eastern chimpanzees (Pan troglodytes schweinfurthi) in a 12,770-km2area of lowland forest between the Lowa, Luka, Lugulu, and Oku rivers in eastern Democratic Republic of Congo, the site of the largest continuous population of Grauer's gorillas. The survey included a total of 480 km of transects completed

Research paper thumbnail of Reduced abundance of late-successional trees but not of seedlings in heavily compared with lightly logged sites of three East African tropical forests

Journal of Tropical Ecology, Aug 31, 2010

Logged forests form an increasingly large proportion of tropical landscapes but disproportionatel... more Logged forests form an increasingly large proportion of tropical landscapes but disproportionately few studies have studied the impact of forest disturbance, e.g. lightly vs. heavily logged, on tree and seedling communities simultaneously. We sampled all trees (on 1 ha) and all recently germinated seedlings (on 90 m 2) in three lightly and three heavily logged sites in each of the following three East African tropical forests: Budongo Forest and Mabira Forest in Uganda and Kakamega Forest in Kenya. We analysed species richness, diversity, abundance and community composition of late-and early-successional trees and seedlings. We recorded no difference in species richness or diversity of late-successional or early-successional trees between lightly and heavily logged sites. However, the abundance of late-successional species was lower in heavily than lightly logged sites. Moreover, there was no difference in species richness or diversity of trees among the three forests. Yet, abundances of late-successional trees were higher in Budongo Forest than in Mabira Forest and Kakamega Forest. Species richness, diversity and abundance of seedlings did not differ between lightly and heavily logged sites. Only the abundance of seedlings of late-successional species differed among the forests with more individuals in Budongo Forest than in Mabira Forest. This was corroborated by non-metric multidimensional scaling (NMDS) showing clear differences in composition of tree and seedling communities among the three forests. Thus, both, the tree and seedling communities differed significantly among the three forests but not between lightly and heavily logged sites.

Research paper thumbnail of Vascular Plant Diversity and Community Structure of Nandi Forests, Western Kenya

Journal of East African Natural History, 2015

Research paper thumbnail of Annotated Checklist of the Vascular Plants of Kakamega Forest, Western Province, Kenya

Journal of East African Natural History, 2010

... The authors are grateful for the invaluable assistance of the Director and staff of the Natio... more ... The authors are grateful for the invaluable assistance of the Director and staff of the National Museums of Kenya, Nairobi, especially Helida Oyieke, Beatrice Khayota and Siro Masinde, and the staff of Maseno University, Kenya Wildlife Service (KWS) and Kakamega ...

Research paper thumbnail of Reduced abundance of late-successional trees but not of seedlings in heavily compared with lightly logged sites of three East African tropical forests

Journal of Tropical Ecology, 2010

Logged forests form an increasingly large proportion of tropical landscapes but disproportionatel... more Logged forests form an increasingly large proportion of tropical landscapes but disproportionately few studies have studied the impact of forest disturbance, e.g. lightly vs. heavily logged, on tree and seedling communities simultaneously. We sampled all trees (on 1 ha) and all recently germinated seedlings (on 90 m 2) in three lightly and three heavily logged sites in each of the following three East African tropical forests: Budongo Forest and Mabira Forest in Uganda and Kakamega Forest in Kenya. We analysed species richness, diversity, abundance and community composition of late-and early-successional trees and seedlings. We recorded no difference in species richness or diversity of late-successional or early-successional trees between lightly and heavily logged sites. However, the abundance of late-successional species was lower in heavily than lightly logged sites. Moreover, there was no difference in species richness or diversity of trees among the three forests. Yet, abundances of late-successional trees were higher in Budongo Forest than in Mabira Forest and Kakamega Forest. Species richness, diversity and abundance of seedlings did not differ between lightly and heavily logged sites. Only the abundance of seedlings of late-successional species differed among the forests with more individuals in Budongo Forest than in Mabira Forest. This was corroborated by non-metric multidimensional scaling (NMDS) showing clear differences in composition of tree and seedling communities among the three forests. Thus, both, the tree and seedling communities differed significantly among the three forests but not between lightly and heavily logged sites.

Research paper thumbnail of Rediscovery of Boulengerula fischeri , with notes on its morphology and habitat

African Journal of Herpetology, 2011

*Caecilians remain an enigmatic component of the tropical terrestrial fauna due in part to their ... more *Caecilians remain an enigmatic component of the tropical terrestrial fauna due in part to their cryptic life-history but also to a lack of directed effort towards their study. Many species are known from single specimens associated with poor collection data, which has not facilitated recollection. Consequently, nearly two thirds of species are currently considered Data Deficient by the IUCN. Boulengerula fischeri was described from a single specimen deposited onto a car by an unknown collector in 1987, and has defied attempts at relocation for nearly 20 years. Herein we describe a collection of 20 individuals from agricultural land immediately outside Cyamudongo Forest in southwestern Rwanda, around 3 km from the type locality. Adults were found to attain a remarkable maximum length of nearly 400 mm despite being only 4.5 mm wide (maximum elongation index of 102). The range of morphometric and meristic measurements taken include those given for the type specimen, featuring mean annular and vertebral counts of 199.4 and 191.8, respectively. The estimated density of B. fischeri was found to be 50 animals h (1 km (1 and is comparable with other species of Boulengerula. Despite our new collection records, we recommend that this species remains Data Deficient until its range can be better described.

Research paper thumbnail of Rediscovery of Boulengerula fischeri , with notes on its morphology and habitat

African Journal of Herpetology, 2011

*Caecilians remain an enigmatic component of the tropical terrestrial fauna due in part to their ... more *Caecilians remain an enigmatic component of the tropical terrestrial fauna due in part to their cryptic life-history but also to a lack of directed effort towards their study. Many species are known from single specimens associated with poor collection data, which has not facilitated recollection. Consequently, nearly two thirds of species are currently considered Data Deficient by the IUCN. Boulengerula fischeri was described from a single specimen deposited onto a car by an unknown collector in 1987, and has defied attempts at relocation for nearly 20 years. Herein we describe a collection of 20 individuals from agricultural land immediately outside Cyamudongo Forest in southwestern Rwanda, around 3 km from the type locality. Adults were found to attain a remarkable maximum length of nearly 400 mm despite being only 4.5 mm wide (maximum elongation index of 102). The range of morphometric and meristic measurements taken include those given for the type specimen, featuring mean annular and vertebral counts of 199.4 and 191.8, respectively. The estimated density of B. fischeri was found to be 50 animals h (1 km (1 and is comparable with other species of Boulengerula. Despite our new collection records, we recommend that this species remains Data Deficient until its range can be better described.

Research paper thumbnail of Survey of Grauer's Gorillas ( Gorilla gorilla graueri ) and Eastern Chimpanzees (Pan troglodytes schweinfurthi) in the Kahuzi-Biega National Park Lowland Sector and Adjacent Forest in Eastern Democratic Republic of Congo

International Journal of Primatology, 1998

We describe the distribution and estimate densities of Grauer's gorillas (Gorilla gorilla gr... more We describe the distribution and estimate densities of Grauer's gorillas (Gorilla gorilla graueri) and eastern chimpanzees (Pan troglodytes schweinfurthi) in a 12,770-km2area of lowland forest between the Lowa, Luka, Lugulu, and Oku rivers in eastern Democratic Republic of Congo, the site of the largest continuous population of Grauer's gorillas. The survey included a total of 480 km of transects completed

Research paper thumbnail of Reduced abundance of late-successional trees but not of seedlings in heavily compared with lightly logged sites of three East African tropical forests

Journal of Tropical Ecology, Aug 31, 2010

Logged forests form an increasingly large proportion of tropical landscapes but disproportionatel... more Logged forests form an increasingly large proportion of tropical landscapes but disproportionately few studies have studied the impact of forest disturbance, e.g. lightly vs. heavily logged, on tree and seedling communities simultaneously. We sampled all trees (on 1 ha) and all recently germinated seedlings (on 90 m 2) in three lightly and three heavily logged sites in each of the following three East African tropical forests: Budongo Forest and Mabira Forest in Uganda and Kakamega Forest in Kenya. We analysed species richness, diversity, abundance and community composition of late-and early-successional trees and seedlings. We recorded no difference in species richness or diversity of late-successional or early-successional trees between lightly and heavily logged sites. However, the abundance of late-successional species was lower in heavily than lightly logged sites. Moreover, there was no difference in species richness or diversity of trees among the three forests. Yet, abundances of late-successional trees were higher in Budongo Forest than in Mabira Forest and Kakamega Forest. Species richness, diversity and abundance of seedlings did not differ between lightly and heavily logged sites. Only the abundance of seedlings of late-successional species differed among the forests with more individuals in Budongo Forest than in Mabira Forest. This was corroborated by non-metric multidimensional scaling (NMDS) showing clear differences in composition of tree and seedling communities among the three forests. Thus, both, the tree and seedling communities differed significantly among the three forests but not between lightly and heavily logged sites.

Research paper thumbnail of Vascular Plant Diversity and Community Structure of Nandi Forests, Western Kenya

Journal of East African Natural History, 2015

Research paper thumbnail of Annotated Checklist of the Vascular Plants of Kakamega Forest, Western Province, Kenya

Journal of East African Natural History, 2010

... The authors are grateful for the invaluable assistance of the Director and staff of the Natio... more ... The authors are grateful for the invaluable assistance of the Director and staff of the National Museums of Kenya, Nairobi, especially Helida Oyieke, Beatrice Khayota and Siro Masinde, and the staff of Maseno University, Kenya Wildlife Service (KWS) and Kakamega ...

Research paper thumbnail of Reduced abundance of late-successional trees but not of seedlings in heavily compared with lightly logged sites of three East African tropical forests

Journal of Tropical Ecology, 2010

Logged forests form an increasingly large proportion of tropical landscapes but disproportionatel... more Logged forests form an increasingly large proportion of tropical landscapes but disproportionately few studies have studied the impact of forest disturbance, e.g. lightly vs. heavily logged, on tree and seedling communities simultaneously. We sampled all trees (on 1 ha) and all recently germinated seedlings (on 90 m 2) in three lightly and three heavily logged sites in each of the following three East African tropical forests: Budongo Forest and Mabira Forest in Uganda and Kakamega Forest in Kenya. We analysed species richness, diversity, abundance and community composition of late-and early-successional trees and seedlings. We recorded no difference in species richness or diversity of late-successional or early-successional trees between lightly and heavily logged sites. However, the abundance of late-successional species was lower in heavily than lightly logged sites. Moreover, there was no difference in species richness or diversity of trees among the three forests. Yet, abundances of late-successional trees were higher in Budongo Forest than in Mabira Forest and Kakamega Forest. Species richness, diversity and abundance of seedlings did not differ between lightly and heavily logged sites. Only the abundance of seedlings of late-successional species differed among the forests with more individuals in Budongo Forest than in Mabira Forest. This was corroborated by non-metric multidimensional scaling (NMDS) showing clear differences in composition of tree and seedling communities among the three forests. Thus, both, the tree and seedling communities differed significantly among the three forests but not between lightly and heavily logged sites.

Research paper thumbnail of Rediscovery of Boulengerula fischeri , with notes on its morphology and habitat

African Journal of Herpetology, 2011

*Caecilians remain an enigmatic component of the tropical terrestrial fauna due in part to their ... more *Caecilians remain an enigmatic component of the tropical terrestrial fauna due in part to their cryptic life-history but also to a lack of directed effort towards their study. Many species are known from single specimens associated with poor collection data, which has not facilitated recollection. Consequently, nearly two thirds of species are currently considered Data Deficient by the IUCN. Boulengerula fischeri was described from a single specimen deposited onto a car by an unknown collector in 1987, and has defied attempts at relocation for nearly 20 years. Herein we describe a collection of 20 individuals from agricultural land immediately outside Cyamudongo Forest in southwestern Rwanda, around 3 km from the type locality. Adults were found to attain a remarkable maximum length of nearly 400 mm despite being only 4.5 mm wide (maximum elongation index of 102). The range of morphometric and meristic measurements taken include those given for the type specimen, featuring mean annular and vertebral counts of 199.4 and 191.8, respectively. The estimated density of B. fischeri was found to be 50 animals h (1 km (1 and is comparable with other species of Boulengerula. Despite our new collection records, we recommend that this species remains Data Deficient until its range can be better described.

Research paper thumbnail of Rediscovery of Boulengerula fischeri , with notes on its morphology and habitat

African Journal of Herpetology, 2011

*Caecilians remain an enigmatic component of the tropical terrestrial fauna due in part to their ... more *Caecilians remain an enigmatic component of the tropical terrestrial fauna due in part to their cryptic life-history but also to a lack of directed effort towards their study. Many species are known from single specimens associated with poor collection data, which has not facilitated recollection. Consequently, nearly two thirds of species are currently considered Data Deficient by the IUCN. Boulengerula fischeri was described from a single specimen deposited onto a car by an unknown collector in 1987, and has defied attempts at relocation for nearly 20 years. Herein we describe a collection of 20 individuals from agricultural land immediately outside Cyamudongo Forest in southwestern Rwanda, around 3 km from the type locality. Adults were found to attain a remarkable maximum length of nearly 400 mm despite being only 4.5 mm wide (maximum elongation index of 102). The range of morphometric and meristic measurements taken include those given for the type specimen, featuring mean annular and vertebral counts of 199.4 and 191.8, respectively. The estimated density of B. fischeri was found to be 50 animals h (1 km (1 and is comparable with other species of Boulengerula. Despite our new collection records, we recommend that this species remains Data Deficient until its range can be better described.