Banca de DEFESA: DAVID CERQUEIRA SOUZA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : DAVID CERQUEIRA SOUZA
DATE: 30/11/2022
TIME: 08:00
LOCAL: Instituto de Biologia
TITLE:

ANTHROPOGENIC EDGE EFFECTS ON INSECT POLLINATION

KEY WORDS:

edge influence; floral visitors; pollinator; Hymenoptera; plant production.

PAGES: 67
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUMMARY:

Edge effects (or edge influence) are consequences of habitat fragmentation and affect biodiversity, often altering important ecological processes such as pollination. With the increasing worldwide trend of loss and fragmentation of natural habitats to anthropogenic land uses – which is considered one of the main causes of the decline of pollinating insects – it is necessary to understand how these insects respond to edges. We hypothesized that there would be a greater abundance, richness, and visitation by insects on flowers located at the edges, but that, due to changes in the interactions between plants and pollinators and between the visiting species, the effectiveness of pollination would be negatively affected. To understand how anthropogenic edges affect pollination by insects and to assess the state of the art of studies on this subject, we performed a global review of the literature published until 2021 on this subject. We assessed whether the floral visitors and the production of fruits and seeds by the visited plants respond (either positively or negatively) to edges and used a Monte Carlo approach to assess statistical significance. We detected an increase in the number of studies with time and with more studies having been performed in the temperate region than in the tropics, probably due to the better economical development of the countries with most research. The greatest interest was concentrated on the order Hymenoptera and on the effects on plant production. There was a larger abundance of floral visitor at the edges than in the interior, an increase in visitation by Hymenoptera in the temperate region, but no effects on pollinator richness. Notwithstanding the increase in insect abundance and visitation, fruit and/or seed production decreased at the edges. Our results indicate that, notwithstanding the growth in interest on this subject in papers during the study period, parts of the tropical region still lack much in studies. It is also important to better distribute the research effort among other pollinator insects. Finally, we recommend the sharing of the raw data of the studies to permit performing additional analyses.

COMMITTEE MEMBERS:
Presidente - 3054284 - PAVEL DODONOV
Interna - 3246008 - JULIANA HIPOLITO DE SOUSA
Externa à Instituição - ELIANA CAZETTA - UESC-BA