Banca de DEFESA: LAYSSA CARLA RODRIGUES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : LAYSSA CARLA RODRIGUES
DATA : 30/07/2021
HORA: 14:00
LOCAL: Campus Universitário de Rolim de Moura
TÍTULO:

Are the protected areas of the state of Rondônia connected by ecological corridors?

PALAVRAS-CHAVES:

Land use. Habitat loss. Fragmentation. Connectivity.

PÁGINAS: 62
GRANDE ÁREA: Outra
ÁREA: Ciências Ambientais
RESUMO:

Changes in land cover caused by anthropic actions lead to habitat loss and fragmentation, resulting in a negative effect on biodiversity. In the Amazon, pressure on natural resources, especially on forests, intensified from 1970 onwards. In this scenario, actions for the establishment of Protected Areas (PAs) with the aim of conserving biodiversity were adopted. The amount of these areas in the Amazon has increased considerably since the 70's, however, some are inserted in an anthropic matrix dominated by agriculture and livestock, which makes them isolated. One way to reduce isolation and increase connectivity between these protected areas is through the establishment of Ecological Corridors (ECs), a band of habitat connecting one or more habitats. Thus, the objective of this study was to simulate the presence of ecological corridors between all protected areas, calculate the degree of connectivity for the set of PAs and the level of conservation priority for each PA in the state of Rondônia. For this, we used land cover use images in 2019 made available by MapBiomas. Land cover was classified into the water, forest, anthropogenic area, and roads. For the simulation of the corridors, the land use map was transformed into a resistance map where forest that is considered habitat had weight 1, water bodies weight 5, anthropized areas weight 100, and roads for representing a barrier to species dispersion had weight 150 for unpaved and 200 for paved. A 2019 map of PAs (study and federal conservation units and indigenous lands) of the state of Rondônia was used. The PAs that presented overlapping areas and are in the same region were joined into blocks, thus 41 blocks of PAs were formed for the state of Rondônia. Finally, a database was created in GRASS GIS 7.0 using the strength map and block map. This map was loaded into the LSCorridors program to simulate the possible corridors between the 41 (pairs) blocks, which resulted in 820 combinations. For each combination, 15 simulations (12,300 simulated corridors) were performed using the MP method, without landscape influence. Furthermore, to assess the degree of connectivity of the APs and the priority index for conservation, the Integral Connectivity Index (IIC) was used considering the maximum dispersion distances of 1, 10, 30, and 100 km. After the simulations performed, the Route Selection Frequency Index (RSFI) was calculated and this included all the simulated paths and the frequency with which each pixel was considered during the simulations. High RSFI valued pixels indicated potential routes to be used as CEs. The Integral Connectivity Index (IIC) varied with the limit of maximum dispersion distances (1 km = 0.026, 10 km = 0.027, 30 km = 0.046 and 100 km = 0.054), with the highest connectivity value found when the limit of 100 km was used. As for the ICC, the conservation priority index showed that the importance of patches for conservation changed with the dispersion limit, except for blocks 8 and 9 which presented a high priority index at all distances. It is noticed that the potential routes of all possible corridors were selected in areas with native vegetation and water bodies on private properties. Thus, the presence of native vegetation (Legal Reserve and Permanent Preservation Areas) on private properties is extremely important for maintaining connectivity between the PAs in the state of Rondônia.

MEMBROS DA BANCA:
Presidente - 2248433 - IZAIAS MEDICE FERNANDES
Interno - 1798567 - PAULO VILELA CRUZ
Externo à Instituição - HUGMAR PAINS DA SILVA - UFMT
Externo à Instituição - JHONY VENDRUSCOLO - UFAM