Landscape Metrics and Conservation Status of Five Mangrove Wetlands in the Eastern Gulf of California Margin

Millán-Aguilar, Olivia; Nettel‐Hernanz, Alejandro; Hurtado‐Oliva, Miguel Ángel; Dodd, Richard S.; Flores-Cárdenas, Francisco; Manzano–Sarabia, Marlenne

doi:10.2112/jcoastres-d-18-00060.1

Cited by 7 publications

(5 citation statements)

References 27 publications

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“…Landscape metrics are important indicators of the landscape pattern. Landscape metrics highlight landscape pattern information, reflect the structural and spatial characteristics, and provide a scientific measurement of landscape structure [34,35]. Table 2 showed the landscape metrics that were selected to describe the spatial change in surface albedo, based on the purpose of this study and the landscape pattern characteristics of the study area.…”

Section: Landscape Metricsmentioning

confidence: 99%

Spatial and Temporal Differences in Surface Albedo over Different Underlying Surfaces in the Badain Jaran Desert, China

He¹,

Yang²,

Xu³

et al. 2021

Pol. J. Environ. Stud.

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IntroductionSurface albedo is an important parameter to simulate land and climate processes [1,2]. Small changes in surface albedo can influence the regional energy balance and water-heat exchange, and can also affect climate change, especially in arid and semi-arid areas. When the surface albedo increases, the net radiation and convergence movement decreases. An increase in surface albedo leads to less cloud and rain and can lead to persistent drought and expansion of desertification in arid and semi-arid areas, which poses a risk to

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Section: Landscape Metricsmentioning

confidence: 99%

Spatial and Temporal Differences in Surface Albedo over Different Underlying Surfaces in the Badain Jaran Desert, China

He¹,

Yang²,

Xu³

et al. 2021

Pol. J. Environ. Stud.

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“…One alternative, to update assessments of conservation status of Pelliciera spp. and other threatened species, is the use of spatial proxies such as landscape metrics (Fernandes et al, 2011;Millán-Aguilar et al, 2019). Several studies have shown the relationship between landscape structure (assessed by landscape metrics), and the diversity, status and/or density of a particular taxon (Uuemaa et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Threatened Mangroves in the Anthropocene: Habitat Fragmentation in Urban Coastalscapes of Pelliciera spp. (Tetrameristaceae) in Northern South America

Blanco-Libreros

Ramírez-Ruiz

2021

Front. Mar. Sci.

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Mangroves are fragmented habitats thriving in human-dominated coastalscapes worldwide. They provide refuge to threatened plant species, such as the Neotropical Piñuelo Mangrove (formerly the monotypic Pelliciera genus, recently split into two species: P. rhizophorae and P. benthamii). However, little is known about the relationship between urbanization and the spatial configuration of mangrove habitat and how it would drive ecological and evolutionary changes in the small populations of Pelliciera spp. We used open data (e.g., land cover, mangrove cover) for 107 locations of Pelliciera spp. in Colombia (extant populations) to assess coastalscape structure and urbanization. We described coastalscape composition dynamics (for 2000 and 2010) and mangrove habitat configuration along a human-domination gradient, using landscape metrics. We computed an urban index to compare urbanization intensity among the study areas along the Caribbean coast and compared coastalscape structure and mangrove spatial metrics between basins (Caribbean and Pacific). The proportion of artificial surfaces was greater in the Caribbean than in the Pacific, but no temporal difference was found. The Caribbean basin exhibited a greater Urban Index, particularly in Cartagena and Urabá. Mangrove fragmentation was also greater in the Caribbean and it was influenced by the degree of urbanization. Mangrove area and core area were smaller in the Caribbean than in the Pacific, while cohesion was significantly lower in Cartagena than in other urban areas of the Caribbean. We propose a conceptual eco-evolutionary framework for linking mangrove patch reduction and isolation to demographic variables of Pelliciera spp. Edge effects are expected to affect birth and mortality rates in small patches. Small patches and small effective populations are expected to be more sensitive to novel biotic interactions, extreme weather, and gradual climate change. Isolation will also influence both emigration and immigration rates of propagules. We propose: (1) Assessing the conservation status of the two species, (2) setting monitoring programs of their populations of Pelliciera spp. and their surrounding coastalscapes (particularly in the Caribbean, (3) declaring protected areas, in wild and urban settings, to reduce mangrove fragmentation and urbanization.

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“…Two kinds of mangrove environments have been defined at higher latitudes according to habitat characteristics: (1) temperate mangroves, which tolerate low water temperatures, with an average of 20°C in the coldest month (water and weather temperature combined; Cavanaugh et al 2014), and (2) arid mangroves, which are in areas with low rainfall (<300 mm • year -1 ), no riverine input, and high evaporation rates (Schaeffer-Novelli and Cintron-Molero 1993;Arreola-Lizárraga et al 2004). Under both conditions, the trees are dwarfed with average heights of less than 3 m (Flores-Verdugo et al 1993;Millán-Aguilar et al 2019). In Baja California Sur (BCS), north-western Mexico, there are examples of mangroves that experience a combination of both conditions.…”

Section: Introductionmentioning

confidence: 99%

Fish communities in high-latitude mangrove in north-western Mexico

Payán-Alcacio¹,

Cruz-Agüero²,

Cruz-Escalona³

et al. 2021

AIeP

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Studying fish communities in extreme habitats is important to better understand the variation in their ranges under climatic scenarios or anthropogenic pressure. In particular, the mangroves in Baja California Sur occupy the northernmost distribution range under two extreme conditions (temperate waters and arid weather). In this context, the aim of the presently reported study was to analyze the functional characteristics of ichthyofauna in two localities, La Paz Bay (BP) and Almejas Bay (BA), which are also located in different ecoregions. For both bays, the composition and frequency values were compiled from monthly samples and the literature. Eleven functional traits were assessed from the morphology of every fish species. Functional indices (Richness, Evenness, Divergence, and Originality) were used to evaluate different aspects of the community structure. A total of 83 species were found at both sites, with 54 in BP and 50 in BA. In BP, six species were residents, eight were temporal visitors, and 36 were occasional visitors. In BA, six species were residents, 15 species were temporal visitors, and 33 were occasional visitors. At both sites, 12% of the species were permanent residents; BA had a higher percentage of temporal residents (27%), while BP had a higher percentage of occasional visitors (72%). The functional analysis detected communities with specialized traits, but in comparison to BP, BA had higher evenness in the community structure. Although greater structural complexity was expected in the community during the warm months, because of the increase in richness and attributes, BA had higher values during the cold months, which was probably because the area is a transition zone and the fish communities are adapted to colder climates. In comparison to BA, BP had higher originality values, and colder months presented higher values than warmer months. Although the mangrove sites had the same northernmost latitudinal limits and both had extreme conditions compared to those in mangroves in tropical environments, the fish communities differed in their composition, frequency, and functionality with more extreme functional traits in colder weather than in warmer weather.

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Landscape Metrics and Conservation Status of Five Mangrove Wetlands in the Eastern Gulf of California Margin

Cited by 7 publications

References 27 publications

Spatial and Temporal Differences in Surface Albedo over Different Underlying Surfaces in the Badain Jaran Desert, China

Spatial and Temporal Differences in Surface Albedo over Different Underlying Surfaces in the Badain Jaran Desert, China

Threatened Mangroves in the Anthropocene: Habitat Fragmentation in Urban Coastalscapes of Pelliciera spp. (Tetrameristaceae) in Northern South America

Fish communities in high-latitude mangrove in north-western Mexico

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