Occurrence of Bee Pollinator species along agricultural and grazing gradient in Northern Tanzania
Citation
Lasway J, Kinabo N, Mremi R, Martin E, Nyakunga O, Sanya J, Pauly A, Eardly C, Rwegasira G, Lesio N, Peters M, Stefan-Dewenter I, Njovu H (2021). Occurrence of Bee Pollinator species along agricultural and grazing gradient in Northern Tanzania. Version 1.5. TanBIF. Occurrence dataset https://doi.org/10.15468/hdcdf3 accessed via GBIF.org on 2024-11-14.Description
Data were collected in 40 study sites distributed along grazing and agricultural gradients in the study area intermittently from August to December 2018. A paired patch study design was adopted in each site, whereby two 50 x 50 m plots were established for bee sampling. We sampled bees using a combination of pan traps and sweep-netting techniques, which have successfully been used for sampling bees in the Kilimanjaro region and other parts of the world. In each plot, four UV-reflecting pan trap clusters (each with yellow, white, and blue) traps were set and left in the field for 48 hours. We also conducted a transect walk with sweep nets to sample bee faunal whereby two researchers were actively collecting bees for two hours per site. The collected bees were temporarily stored in 70% ethanol before dried, pinned and later identified by the taxonomists to species level. Data collection were made possible through the Bee-pollinator Monitoring Project, Tanzania, implemented by the College of African Wildlife Management, Mweka, under financial support from the JRS Biodiversity Foundation, USA.Sampling Description
Study Extent
The study was carried out in a set of study sites established in agricultural (transformed), grazing (degraded), and natural savannah (conserved) lands to represent different land-use categories.Sampling
Data were collected in 40 study sites distributed along grazing and agricultural gradients in the study area intermittently from August to December 2018. Study sites were pre-selected using remote sensing techniques in the Google Earth Engine (GEE), followed by ground-truthing to confirm the sites basing on the level of land use and vegetation cover. A paired patch study design was adopted in each site whereby two 50 x 50 m plots were established for bee sampling. The two plots were placed at an interval of 300 m in the opposite direction and a GPS coordinate of each site was recorded at the midpoint between the two plots using a hand-held device (Garmin; GPSMAP64s, Garmin Ltd, Taiwan).Quality Control
Bees data collected from each study site were enriched with other information such as location (coordinates and elevation) and habitat type. The coordinates and elevation of localities were derived from a hand-held Garmin GPS (Model: GPSMAP64s; resolution ±3 m; Garmin Ltd, Taiwan). Also, for each study site, information on weather parameters (temperature and precipitation) and forage resources were recorded. The specimens collected were preserved in 70% ethanol before they were dried, pinned, and later identified by bee taxonomists. The reference bee collections are available at the College of African Wildlife Management, Mweka.Method steps
- We sampled bees using a combination of pan traps and sweep-netting techniques which have successfully been used for sampling bees in the Kilimanjaro region and other parts of the world. In each plot, four UV-reflecting pan trap clusters (each with yellow, white, and blue) traps were set and left in the field for 48 hours. To increase the chances of collecting bees foraging on shrubs in each plot, we installed two clusters with a 120 cm pole and the remaining two had a 35 cm pole for capturing bees foraging herbaceous plants. The traps were consistently checked for captures at 8:00 am and 16:00 pm everyday. The total trapping effort was 1,152 hours per site. We also conducted a transect walk with sweep nets to sample bee faunal whereby, two researchers were actively collecting bees for two hours per site. This method summed to a sampling effort of 4 man-hours per study site.
Taxonomic Coverages
Bees (Hymenoptera) play important ecological roles in ecosystems. Taxonomic information of bees in many parts of the world is fragmented and Tanzania is no exception. This dataset describes a total of 953 occurrences for bees representing 4 families, 20 genera, and 45 species.
-
Hymenopteranscommon name: Bees rank: species
Geographic Coverages
The data on bee occurrence were collected from Northern Tanzania in Kilimanjaro, Arusha, and Manyara regions. The study regions are located between latitude 3°30’ S and 4°45’ S and longitude 4°30' E to 5°45’ E. The study was piloted in these regions to establish baseline information and monitoring standards prior to a countrywide upscale project in the near future.
Bibliographic Citations
Contacts
Julius Laswayoriginator
position: Assistant Lecturer
CAWM
3031
Moshi
3031
TZ
email: julizo@yahoo.com
Neema Kinabo
originator
CAWM
P.O Box 3031
Moshi
3031
Kilimanjaro
TZ
Telephone: 0719811529
email: neemarobertk@gmail.com
Rudolf Mremi
originator
CAWM
TZ
email: wildedolf@gmail.com
Emmanuel Martin
originator
CAWM
TZ
Oliver Nyakunga
originator
CAWM
TZ
John Sanya
originator
CAWM
TZ
Alain Pauly
originator
BE
Connal Eardly
originator
ZA
Gration Rwegasira
originator
SUA
TZ
Neciphor Lesio
originator
TAWIRI
TZ
Marcel Peters
originator
DE
Ingolf Stefan-Dewenter
originator
DE
Henry Njovu
originator
WCST
TZ
email: henrynjovu01@gmail.com
Neema Kinabo
metadata author
position: Assistant Lecturer
CAWM
3031
Moshi
3031
TZ
Telephone: 0719811529
email: neemarobertk@gmail.com
Emmanuel Martin
author
position: Lecturer
CAWM
3031
Moshi
3031
TZ
John Sanya
author
position: Assistant
Lecturer
3031
Moshi
3031
TZ
email: jojusanya@gmail.com
Rudolf Mremi
administrative point of contact
position: Assistant Lecturer
CAWM
3031
Moshi
3031
TZ
email: wildedolf@gmail.com
Oliver Nyakunga
author
position: Lecturer
CAWM
3031
Moshi
3031
TZ
Gration Rwegasira
author
position: Prof
SUA
TZ
Neciphor Lesio
author
TAWIRI
TZ
Connal Eardly
author
ZA
Alain Pauly
author
BE
Townsend Peterson
author
US
Marcel Peters
author
DE
Ingolf Steffan-Dewenter
author
DE
Henry Njovu
author
WCST
TZ
email: henrynjovu01@gmail.com
Neema Kinabo
administrative point of contact
position: Assistant Lecturer
CAWM
3031
Moshi
3031
TZ
Telephone: 0719811529
email: neemarobertk@gmail.com