scholarly journals Massive decline of Cystoseira abies-marina forests in Gran Canaria Island (Canary Islands, eastern Atlantic)

2017 ◽  
Vol 81 (4) ◽  
pp. 499 ◽  
Author(s):  
José Valdazo ◽  
M. Ascensión Viera-Rodríguez ◽  
Fernando Espino ◽  
Ricardo Haroun ◽  
Fernando Tuya
Keyword(s):  
Canary Islands ◽  
Human Impacts ◽  
Anthropogenic Pressure ◽  
Rocky Shores ◽  
Anthropogenic Pressures ◽  
Brown Macroalgae ◽  
Gran Canaria ◽  
Key Species ◽  
Entire Island ◽  
Over Time

Brown macroalgae within the genus Cystoseira are some of the most relevant “ecosystem-engineers” found throughout the Mediterranean and the adjacent Atlantic coasts. Cystoseira-dominated assemblages are sensitive to anthropogenic pressures, and historical declines have been reported from some regions. In particular, Cystoseira abies-marina, thriving on shallow rocky shores, is a key species for the ecosystems of the Canary Islands. In this work, we analyse changes in the distribution and extension of C. abies-marina in the last decades on the island of Gran Canaria. This alga dominated the shallow rocky shores of the entire island in the 1980s; a continuous belt extended along 120.5 km of the coastline and occupied 928 ha. In the first decade of the 21st century, fragmented populations were found along 52.2 km of the coastline and occupied 12.6 ha. Today, this species is found along 37.8 km of the coastline and occupies only 7.4 ha, mainly as scattered patches. This regression has been drastic around the whole island, even in areas with low anthropogenic pressure; the magnitude of the decline over time and the intensity of local human impacts have not shown a significant correlation. This study highlights a real need to implement conservation and restoration policies for C. abies-marina in this region.

Human impacts quantification on the coastal landforms of Gran Canaria Island (Canary Islands)

Geomorphology ◽  
2017 ◽  
Vol 286 ◽  
pp. 58-67 ◽  
Author(s):  
Nicolás Ferrer-Valero ◽  
Luis Hernández-Calvento ◽  
Antonio I. Hernández-Cordero
Keyword(s):  
Canary Islands ◽  
Human Impacts ◽  
Gran Canaria ◽  
Coastal Landforms

scholarly journals An index to integrate stress due to anthropogenic pressures along the shoreline and case study of a tourist destination in Brazil

2018 ◽  
Author(s):  
Fernanda Araujo Casares ◽  
Lélis Antonio Carlos-Jr ◽  
Joel Christopher Creed ◽  
Simone Siag Oigman-Pszczol
Keyword(s):  
Southeastern Brazil ◽  
Rocky Shores ◽  
Shoreline Development ◽  
Anthropogenic Pressures ◽  
Tourist Destination ◽  
Rapid Urbanization ◽  
Gas Stations ◽  
Significant Difference ◽  
Over Time

In order to compare stress on marine coastal ecosystems at different sites and over time we developed an Environmental Pressure Index (EPI). The index was composed of twenty-four parameters which could be observed and quantified at each site or from maps. The parameters metrics were taken in water, on shore or from the catchment and were grouped into eight ecosystem degrading stressors: Urban development, shoreline development, presence of sewage outfalls, presence of human debris, constructions on the shore, nautical gas stations, fishing pressure, recreational activities and nautical and shipping activities. The parameters were standardized to a maximum and had different weighting established from the literature, giving an EPI which varies from 0 to 1. We applied the Index to the tropical rocky shores and marginal reef ecosystem of the Armação dos Búzios, a tourist destination situated on a peninsula in Southeastern Brazil. The region has experienced rapid urbanization since the 1950s. Data were obtained for 11 sites and the Index was calculated for 2000/2001 and compared to data generated in 2016/2017. In 2000/2001 EPI varied from 0.01-0.47 and in 2016/2017 from 0.04-0.55 and although some sites worsened others improved and no significant difference in EPI was found over time for the region.

scholarly journals El Ecomuseo como espacio para la activación de procesos de gobernanza turística. Cogestión del patrimonio como gestión responsable

2020 ◽  
Vol 4 (6) ◽  
pp. 9-38
Author(s):  
Héctor Moreno Mendoza ◽  
Agustín Santana Talavera
Keyword(s):  
Resource Management ◽  
Community Development ◽  
Canary Islands ◽  
Development Project ◽  
Gran Canaria ◽  
Local Populations ◽  
Flexible Management ◽  
Governance Processes ◽  
The Village ◽  
Over Time

An ecomuseum guides its conservation, training, and identity building and heritage reproduction, based on proximity to the territory and its populations. This entails a flexible management system that adapts to contextual specificities, empowering local populations to govern themselves in relation to a common project. This study explores the activation in ecomuseum governance processes, in particular The Cultural Community Development Project of the Village on the island of Gran Canaria (Canary Islands, Spain), consisting of 15 museums related to traditional crafts and work. From the analysis it is possible to confirm that co-management, in accordance with governance, is an effective tool for sharing responsibilities and competencies in resource management, being sustainable over time and contributing to overcoming intermediate crisis (economic and social).

scholarly journals An index to integrate stress due to anthropogenic pressures along the shoreline and case study of a tourist destination in Brazil

2018 ◽  
Author(s):  
Fernanda Araujo Casares ◽  
Lélis Antonio Carlos-Jr ◽  
Joel Christopher Creed ◽  
Simone Siag Oigman-Pszczol
Keyword(s):  
Southeastern Brazil ◽  
Rocky Shores ◽  
Shoreline Development ◽  
Anthropogenic Pressures ◽  
Tourist Destination ◽  
Rapid Urbanization ◽  
Gas Stations ◽  
Significant Difference ◽  
Over Time

In order to compare stress on marine coastal ecosystems at different sites and over time we developed an Environmental Pressure Index (EPI). The index was composed of twenty-four parameters which could be observed and quantified at each site or from maps. The parameters metrics were taken in water, on shore or from the catchment and were grouped into eight ecosystem degrading stressors: Urban development, shoreline development, presence of sewage outfalls, presence of human debris, constructions on the shore, nautical gas stations, fishing pressure, recreational activities and nautical and shipping activities. The parameters were standardized to a maximum and had different weighting established from the literature, giving an EPI which varies from 0 to 1. We applied the Index to the tropical rocky shores and marginal reef ecosystem of the Armação dos Búzios, a tourist destination situated on a peninsula in Southeastern Brazil. The region has experienced rapid urbanization since the 1950s. Data were obtained for 11 sites and the Index was calculated for 2000/2001 and compared to data generated in 2016/2017. In 2000/2001 EPI varied from 0.01-0.47 and in 2016/2017 from 0.04-0.55 and although some sites worsened others improved and no significant difference in EPI was found over time for the region.

scholarly journals Screening of antimicrobial activities in red, green and brown macroalgae from Gran Canaria (Canary Islands, Spain)

2001 ◽  
Vol 4 (1) ◽  
pp. 35-40 ◽  
Author(s):  
Antonio Val ◽  
Gonzalo Platas ◽  
Angela Basilio ◽  
Angeles Cabello ◽  
Julian Gorrochategui ◽  
...  
Keyword(s):  
Canary Islands ◽  
Antimicrobial Activities ◽  
Brown Macroalgae ◽  
Gran Canaria

New records of naturalised and invasive cacti (Cactaceae) from Gran Canaria and Tenerife, Canary Islands, Spain

Bradleya ◽  
2017 ◽  
Vol 35 (35) ◽  
pp. 58-79 ◽  
Author(s):  
Filip Verloove ◽  
Elizabeth Ojeda-Land ◽  
Gideon F. Smith ◽  
Alessandro Guiggi ◽  
Jorge Alfredo Reyes-Betancort ◽  
...  
Keyword(s):  
Canary Islands ◽  
New Records ◽  
Gran Canaria

scholarly journals New xenophytes from the Canary Islands (Gran Canaria and Tenerife; Spain)

2017 ◽  
Vol 76 (2) ◽  
pp. 120-131 ◽  
Author(s):  
Filip Verloove
Keyword(s):  
Canary Islands ◽  
Vascular Plant ◽  
Psidium Guajava ◽  
Nerium Oleander ◽  
Gran Canaria ◽  
Cyperus Difformis ◽  
Eclipta Prostrata ◽  
Callistemon Viminalis ◽  
Eucalyptus Gomphocephala ◽  
Chloris Barbata

Abstract Recent fieldwork in Gran Canaria and Tenerife (Canary Islands, Spain), mostly between 2012 and 2016, yielded new chorological data for several non-native vascular plant species. The following are considered naturalized and/or potentially invasive: Callistemon viminalis, Casuarina glauca, Chloris barbata, Cyperus difformis, Eucalyptus gomphocephala, E. sideroxylon, Nephrolepis cordifolia, Rumex palustris, Senna × artemisioides (s.l.) and S. × floribunda and are reported for the first time from the Canary Islands. Other first records include: Cascabela thevetia (Tenerife), Cyclospermum leptophyllum (Gran Canaria), Digitaria radicosa (Gran Canaria, Tenerife), Dysphania anthelmintica (Tenerife), Erythrostemon gilliesii (Tenerife), Heliotropium supinum (Tenerife), Limoniastrum monopetalum (Tenerife), Nerium oleander (Tenerife), Pascalia glauca (Tenerife), Phytolacca americana (Tenerife), Podranea ricasoliana (Gran Canaria), Psidium guajava (Gran Canaria), Rumex cristatus (Tenerife), Schinus terebinthifolia (Tenerife), Solandra maxima (Tenerife), Tipuana tipu (Tenerife) and Youngia japonica (Gran Canaria). More than 20 additional taxa also represent chorological novelties but are considered ephemerals. Finally, miscellaneous notes are added for Diplachne fusca subsp. uninervia, Eclipta prostrata, Pluchea carolinensis, Prosopis juliflora and Sida rhombifolia from Gran Canaria.

scholarly journals Method for monitoring intertidal communities in a steep rocky shore: a combination of digital image technology and field operational strategy

2007 ◽  
Vol 55 (1) ◽  
pp. 19-27 ◽  
Author(s):  
Danuza Nogueira Moysés ◽  
Andréa de Oliveira R. Junqueira ◽  
Helena Passeri Lavrado ◽  
Sérgio Henrique Gonçalves da Silva
Keyword(s):  
Digital Image ◽  
Field Work ◽  
Benthic Invertebrate ◽  
Rocky Intertidal ◽  
Estimation Methods ◽  
Rocky Shores ◽  
Percent Cover ◽  
Intertidal Communities ◽  
Time Reproduction ◽  
Over Time

This paper introduces a method for temporal studies of steep rocky intertidal communities. It combines the use of digital image technology with field methodology, so that a wide area of the community can be sampled in a short time. Two current nondestructive percent cover estimation methods (visual estimation and point intersection) were compared in terms of cost, operational advantages and data quality, with a proposed method for a sucessional study . The proposed method used sequential photos to sample multiple fixed vertical transects over time. Reproduction of the mid-intertidal transect over time was possible by overlaying temporal transects in an image editing program. This method was similar to the point intersection quadrat method used to estimate percent cover. Benefits included reduced time on field work, economic advantages and other advantages of using digital photography, such as recording. Temporal photography of transects provided measurements of recruitment, mortality and population growth, and made it possible to manufacture an animation of sucessional stages. We suggest that this is the best method for providing information and understanding on the process of succession and for monitoring benthic invertebrate intertidal communities on steep rocky shores.

scholarly journals Los soldados del presidio de Gran Canaria en el siglo xvi/

Cliocanarias ◽  
2021 ◽  
pp. 1-33
Author(s):  
Manuel Lobo Cabrera ◽  
Keyword(s):  
Canary Islands ◽  
Gran Canaria

The study of the militias in the Canary archipelago has been a recurring theme in insular historiography, addressed by different authors in breadth and depth, covering not only their organization but also the strategy and weapons used in moments of danger. However, the presence of the presidios in the Canary Islands has had fewer options, as they are professional troops, passing through and reinforcement, that operate on the islands at specific times. The objective, therefore, that we pursue in this study is. in the development of Gran Canaria defense, to oppose the two types of forces that operated in its territory and their characteristics and consequences.

Sign in / Sign up

Export Citation Format

Share Document