a) Remnant area (AREA) |
According to Freitas (2012FREITAS, E. P. Análise integrada do mapa de uso e ocupação das terras da microbacia do Rio Jundiaí-Mirim para fins de gestão ambiental. 2012. 132 f. Dissertação (Mestrado em Agricultura Tropical e Subtropical), Instituto Agronômico de Campinas, Campinas - SP, 2012.), the size of a Forest remnant can be classified in: very small (smaller than 0.50 ha); small (0.50 - 1.00 ha); medium (1.00 - 5.00 ha); good (5.00 - 20.00 ha) and appropriate (up to 20.00 ha). |
b) Central Area Index (CAI) |
Percentage of the core area of a Forest remnant regardless of its marginal rate (60m, considered in this study) and subject to the edge effects (MASSOLI; STATELLA; SANTOS, 2016MASSOLI, J. V.; STATELLA, T.; SANTOS, V. S. Estimativa da fragmentação florestal na microbacia Sepotubinha, Nova Marilândia - MT, entre os anos de 1990 a 2014. Caminhos de Geografia, v. 17, n. 60, p. 48-60, 2016. https://doi.org/10.14393/RCG176004 https://doi.org/10.14393/RCG176004...
; CALEGARI et al., 2010CALEGARI, L. et al. Análise da dinâmica de fragmentos florestais no município de Carandaí, MG, para fins de restauração florestal. Revista Árvore, Viçosa, v. 34, n. 5, p. 871-880, out. 2010. http://dx.doi.org/10.1590/S0100-67622010000500012 http://dx.doi.org/10.1590/S0100-67622010...
). |
c) Circularity Index (CI) |
Relation between the perimeter P (m) and area A (m²) by the equation , which allows to evaluate the form of a remnant and classify it into long (ICI < 0,65), moderately long (0,65 ≤ CI < 0,85) or round (CI ≥ 0.85) (FENGLER et al., 2015FENGLER, F. H. et al. Environmental quality of forest fragments in Jundiaí-Mirim river basin between 1972 and 2013. Revista Brasileira de Engenharia Agrícola e Ambiental, Campina Grande, v. 19, n. 4, p. 402-408, April, 2015. http://dx.doi.org/10.1590/1807-1929/agriambi.v19n4p402-408 http://dx.doi.org/10.1590/1807-1929/agri...
; ETTO et al., 2013ETTO, T. L. et al. Ecologia da paisagem de remanescentes florestais na bacia hidrográfica do Ribeirão das Pedras - Campinas -SP. Revista Árvore, Viçosa, v. 37, n. 6, p. 1063-1071, December, 2013. https://doi.org/10.1590/S0100-67622013000600008 https://doi.org/10.1590/S0100-6762201300...
). |
d) Euclidean Nearest-Neighbor (ENN) |
Euclidean distance calculated in meters from the edge of a remnant to the edge of the closest remnant around (FERNANDES et al., 2017FERNANDES, M.; FERNANDES, R. D. M. Análise Espacial da Fragmentação Florestal da Bacia do Rio Ubá - RJ. Ciência Florestal, Santa Maria, v. 27, n. 4, p. 1429-1439, 2017. http://dx.doi.org/10.5902/1980509830330 http://dx.doi.org/10.5902/1980509830330...
). |
e) Proximity to Water Flow (PROXFLOW) and Water Production (WAT) |
Euclidean distance calculated in meters of a Forest remnant to the closest water flow (PROXFLOW) and presence of sources in the remnants (WATER). This has been evaluated from the survey on hydrography and sources updated by the Secretaria do Verde, Meio Ambiente e do Desenvolvimento Sustentável from Campinas City Hall, to the scale 1:5.000 in 2014 (CAMPINAS, 2018). |
f) Land Use and Occupation in the Surrounding Areas (SUR): |
Identification of the class with the highest modification levels present in the surrounding areas of each fragment, within a radius of 175m. For this purpose, Silva and Longo’s (2020SILVA, A. L.; LONGO, R. M. Ecologia da paisagem e qualidade ambiental de remanescentes florestais na sub-bacia hidrográfica do Rio Atibaia dentro do município de Campinas-SP. Ciência Florestal, Santa Maria, v. 30, n.4, 2020. https://doi.org/10.5902/1980509842640 https://doi.org/10.5902/1980509842640...
) classification for the mapping of usage and soil occupation of UGRHI 5, in which: Class 0 (Landscape has not been modified) Class 1 (Simple modification); Class 2 (Medium-level Modification); Class 3 (Large modification); Class 4 (Very large modification). |
g) Soil Erodibility Level (EROD): |
Predominant soil typology evaluation in each Forest remnant, from the Mapa Pedológico Semidetalhado from Campinas Municipality and correlation to the correspondent level of erosion, in which: Haplic Gleisoles (very weak); Red-Yellow oxisols and Yellow oxisols (weak); Haplic Cambisols (strong/very strong); Red-Yellow Argissolos (very strong), according to Salomão (1999SALOMÃO, F. X. T. Controle e prevenção dos Processos Erosivos. In GUERRA, A.J.T.; SILVA, A. S.; BOTELHO, R. G. M. (orgs) Erosão e Conservação dos Solos: Conceitos, Temas e Aplicações. Rio de Janeiro: Bertrand Brasil, 1999. 340p.) and Ross (2005ROSS, J. L. S. Geomorfologia: Ambiente e Planejamento. 2005. 8ed. São Paulo: Contexto, Coleção Repensando a Geografia, 2005. 85p.)* * To any other soil classes which correspond to only 2.5% of the area of the basin and had not provided specific information, a moderate level of erosion has been considered. |