Human Impact in the Midriff Islands

2002 ◽  
Author(s):  
Conrad J. Bahre ◽  
Luis Bourillón
Keyword(s):  
Land Use Planning ◽  
Human Impacts ◽  
Late Nineteenth Century ◽  
Marine Biota ◽  
San Lorenzo ◽  
European Contact ◽  
San Pedro ◽  
Maximum Elevation ◽  
Desert Island ◽  
Northwestern Mexico

Although many students of island biogeography consider the midriff islands one of the world’s last major refuges of pristine desert-island biota, humans have been a part of that ecosystem for possibly 10,000 years or more. Humans have long affected the terrestrial and inshore marine biota, but the most serious injuries they have caused apparently began in the mid- to late nineteenth century with the start of guano mining on Patos, Rasa, and San Pedro Mártir islands. Since then, most of the major human impacts affecting the Midriff are related to rapid population growth in northwestern Mexico and increasing demands for the Midriff’s fishery and tourist resources. This chapter offers both historical and ecological perspectives on the human occupancy of the Midriff, so that a cultural-historical foundation will be available for ecological studies in the region as well as for land-use planning and conservation. The Midriff, located between 28° and 29°45´N and 112° and 114°W, includes the coasts of Lower California and Sonora and 39 islands and islets. Tiburόn, with an area of 1223.53 km2 and a maximum elevation of 1219 m, and Ángel de la Guarda, with an area of 936.04 km2 and a maximum elevation of 1315 m, are among the largest and most mountainous islands of Mexico. The other major islands of the Midriff, in order of decreasing size, are San Esteban (40.72 km2), San Lorenzo (33.03 km2), Smith (Coronado) (9.13 km2), San Lorenzo Norte (Las Ánimas) (4.26 km2), San Pedro Mártir (2.9 km2), Mejía (2.26 km2), Partida Norte (1.36 km2), Dátil (Turner) (1.25 km2), Alcatraz (Tassne or Pelícano) (1.2 km2), Salsipuedes (1.16 km2), Estanque (Pond) (1.03 km2), Rasa (0.68 km2), and Patos (0.45 km2) (Murphy, unpublished data). The entire region is extremely arid, and Tiburón is the only island that has permanent potable water, found in a few springs or in tinajas, although several tinajas on Ángel de la Guarda may contain water for long periods. The only island permanently inhabited since initial European contact is Tiburón, the historic stronghold of the Seri Indians or Comcáac, once a seminomadic, nonagricultural, seafaring, hunting, fishing, and gathering people.

scholarly journals Human impacts on the environment and wildlife in California’s past: Lessons from California archaeology

2021 ◽  
Vol 107 (3) ◽  
pp. 295-319
Author(s):  
Julia Renee Prince-Buitenhuys ◽  
Colleen M. Cheverko ◽  
Eric J. Bartelink ◽  
Veronica Wunderlich ◽  
Kristina Crawford
Keyword(s):  
Human Health ◽  
Wildlife Management ◽  
Management Practices ◽  
Niche Construction ◽  
Human Impacts ◽  
Natural Habitats ◽  
Central California ◽  
European Contact ◽  
Human Niche Construction ◽  
Ecological Baselines

The long history of human-animal interactions in California prior to European contact is frequently not considered when setting ecological baselines and, by consequence, when planning conservation and management expectations and strategies for native species. This article reviews archaeological perspectives that explore the relationship between human niche construction, plant and wildlife populations, and human health in pre-European contact Central California, with an emphasis on the Central Valley and Delta, the surrounding foothills, and the San Francisco Bay Area. A summary of the archaeological record for Central California is provided, along with how niche construction and related evolutionary based models have been used in prehistoric California. Examples of the influences of human niche construction on flora, fauna, and human health from the archaeological and ethnographic record are then discussed. This information is tied to modern wildlife research and management practices that would serve contemporary fish and wildlife management given that human influences on species “natural” habitats and ecological baselines extends much further into the past than current ecological baselines and wildlife management strategies traditionally recognize.

scholarly journals Analysis of flood pulse dynamics in the lower basin of the San Pedro River (northwestern Mexico) using remote sensing

2016 ◽  
Vol 44 (2) ◽  
pp. 293-304 ◽  
Author(s):  
Rafael Hernandez Guzman ◽  
Arturo Ruiz Luna ◽  
Cesar A. Berlanga Robles ◽  
Jesus T. Ponce Palafox
Keyword(s):  
Remote Sensing ◽  
Flood Pulse ◽  
San Pedro River ◽  
Pulse Dynamics ◽  
San Pedro ◽  
Northwestern Mexico

Arrested succession in pastures hinders regeneration of Tropandean forests and shreds mountain landscapes

1997 ◽  
Vol 24 (1) ◽  
pp. 14-23 ◽  
Author(s):  
FAUSTO O. SARMIENTO
Keyword(s):  
Seed Dispersal ◽  
Land Use Planning ◽  
Restoration Ecology ◽  
Spatial Configuration ◽  
Human Impacts ◽  
Arrested Succession ◽  
Hypo Thesis ◽  
Fragmentation Patterns ◽  
And Function ◽  
Pasture Conversion

Arrested succession is conspicuous in the abandoned pastures of the Andean piedmont that have encroached upon the tropical montane forests toward higher limits and steeper slopes. Habitat 'shredding' is analysed to depict the current spatial configuration of tropical Andean landscapes, based on fragmentation patterns prompted by seed dispersal ecology and pasture encroachment.Seed dispersal was studied to address the hypo-thesis that seed input constrains the recruitment of montane forest seedlings, thus impeding pasture conversion to forest. It turns out that a better competitor, the tussock grass Setaria sphacelata, is limiting dispersal success due to its bioarchitecture and planting patterns. Because of the variegation of fragments, the area is in danger of landscape homogeneity within a matrix of degraded pasture. Currently, protection of fragmented remnants and restoration of original landscape structure and function are urgent needs for land-use planning toward sustainable development in the region.Restoration ecology is plausible as a means of conservation for degraded Tropandean forests, since human impacts have shredded landscapes entirely. Dispersal ecology may be used to facilitate pasture conversion to forest in equatorial landscapes, but the proactive approach of pasture removal or planting strategy should differ from that for lowland Amazonia, where abandoned pastures are different from those of montane environs. However, the region may be proactively managed only if political decisions include conservation as a goal of development.

Near Colonization of a Desert Island by a Tropical Bird: Military Macaw (Ara militaris) at Isla San Pedro Nolasco, Sonora, Mexico

2012 ◽  
Vol 57 (4) ◽  
pp. 459-462 ◽  
Author(s):  
Juan Pablo Gallo-Reynoso ◽  
Richard Stephen Felger ◽  
Benjamin Theodore Wilder
Keyword(s):  
San Pedro ◽  
Desert Island ◽  
Tropical Bird

HUMAN IMPACTS ON MARINE BIOTA

1997 ◽  
pp. 247-265
Author(s):  
CAROL M. LALLI ◽  
TIMOTHY R. PARSONS
Keyword(s):  
Human Impacts ◽  
Marine Biota

scholarly journals Transit in Kalki Historical Novels

2021 ◽  
Vol 3 (S-1) ◽  
pp. 279-284
Author(s):  
Nirmaladevi G
Keyword(s):  
Science Fiction ◽  
Subsequent Development ◽  
Literary Form ◽  
Late Nineteenth Century ◽  
Historical Novels ◽  
The Novel ◽  
European Contact ◽  
The People ◽  
Social Novels ◽  
Learning English

The novel is one of the brand new arts acquired by Tamils ​​due to European contact and learning English. In storytelling for Tamils ​​since ancient times; there is involvement. However, the literary form of the novel became known to the people only after learning English novels. As a result, AD.Novels may have appeared in Tamil in the late nineteenth century. By the time the first novel appeared in Tamil, Tamils ​​were well versed in education. So the number of scholars was increasing. Tamils ​​learned to speak English along with Tamil. It is easy for people to move from one place to another due to the convenience of the train. A number of printing presses appeared and printed texts. Thus diminishing the influence of poetry influence of prose grew. These were the reasons for the origin of the Tamil novel and its subsequent development. The novels thus multiplied into science fiction, science fiction, enlightenment novel, Gandhian novel, Marxist novel, social novels, social novels, and historical novels. The purpose of this article is to examine the nature of historical novels and Kalki's contribution to them.

Heavy Metals in Waters and Suspended Sediments Affected by a Mine Tailing Spill in the Upper San Lorenzo River, Northwestern México

2015 ◽  
Vol 94 (5) ◽  
pp. 583-588 ◽  
Author(s):  
F. Páez-Osuna ◽  
H. Bojórquez-Leyva ◽  
M. Bergés-Tiznado ◽  
O. A. Rubio-Hernández ◽  
J. F. Fierro-Sañudo ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Suspended Sediments ◽  
Mine Tailing ◽  
San Lorenzo ◽  
Northwestern Mexico

scholarly journals Regeneración y Estabilización de la playa de San Lorenzo del cantón Salinas, provincia de Santa Elena

2018 ◽  
Vol 5 (1) ◽  
pp. 9-18
Author(s):  
Humberto Guerrero Herrera ◽  
Armando Saltos Sánchez ◽  
Julio Vargas Jiménez
Keyword(s):  
Front Wall ◽  
Sandy Sediment ◽  
Hydraulic Fill ◽  
San Lorenzo ◽  
Yacht Club ◽  
Open Sea ◽  
Maximum Elevation ◽  
Sea Wall ◽  
Santa Elena ◽  
Water Spring

Una solución adecuada para la recuperación de una playa, es regenerarla mediante un Relleno Hidráulico; en el caso de la playa de San Lorenzo (Salinas, provincia de Santa Elena), se propone el uso de una Draga de Succión en Marcha de 1500m3, para la extracción de sedimento arenoso entre 1.3 a 1.6 millas náuticas mar afuera, posteriormente ubicarlo en la playa mediante bombeo de sedimentos, empleando tuberías flotantes (mar) y terrestres. La arena vertida será confinada con una geoestructura (geoducto), ubicada paralela a la playa en los veriles de los 2 y 3 al promedio de las mareas más bajas de sicigia (Mean Low Water Spring - MLWS). La altura máxima de relleno estará comprendida entre las cotas 4.3, 4.5, 4.8 y 4.6 metros al MLWS; lo que hará que la superficie de la berma de la playa este lejos del alcance del mar, aún en condiciones de aguaje. Está previsto que la playa de San Lorenzo tendrá una zona intermareal de 90 m y una duna horizontal de 30 m a las cotas antes indicadas, generando una playa de 50 m siempre fuera de la acción del mar. Longitudinalmente, desarrolla alrededor de 1500 m entre el Yacht Club y el enrocado de San Lorenzo, confinada entre el paramento del Malecón en un ancho de 121 m de geotubos longitudinales, con geospigones perpendiculares a esta alineación. ABSTRACT An adequate solution for beach recuperation is the regeneration through hydraulic fill. In the case of San Lorenzo Beach (Salinas, Santa Elena province) we propose to use a sand dredger to extract about 1500 cubic meters of sand from 1.3 to 1.6 nautical miles in open sea. The sandy sediment will be pumped thru floating ducts and placed on the beach confining the sand in geo ducts which will be placed along contour 2,3 according to the syzygy (Mean Low Water Spring MLWS) average. The maximum elevation above MLWS of the fill will include 4.3, 4.5, 4.8 y 4.6m meters which will be above flooding levels. It is anticipated that the beach will have an intertidal zone of 90 meters and a 30 meters horizontal dune at the levels indicated above generating a beach 50 meters long above the tidal wave. This project will be longitudinally about 1500 meters between the Yacht Club and the San Lorenzo Sea Wall that is confined between the front wall of the boardwalk with a width of 121 meters of longitudinal Geotubes protected with Geostakes perpendicular to this alignment.  

scholarly journals Investigating the Human Impacts and the Environmental Consequences of Microplastics Disposal into Water Resources

2022 ◽  
Vol 14 (2) ◽  
pp. 828
Author(s):  
Grigorios L. Kyriakopoulos ◽  
Miltiadis G. Zamparas ◽  
Vasileios C. Kapsalis
Keyword(s):  
Water Resources ◽  
Human Impacts ◽  
Wide Spectrum ◽  
Analytical Techniques ◽  
Marine Biota ◽  
Anthropogenic Pollutants ◽  
Environmental Consequences ◽  
Coastal Deposits ◽  
Industry Policy ◽  
Key Phrases

During the last decades, one of the most contentious environmental issues has been the investigation of the fate of microplastics (MPs) and detrimental consequences in natural and water resources worldwide. In this respect, it is critical research firstly to track the ways in which MPs are determined as key anthropogenic pollutants in terms of ecological risk and secondly to plan feasible policies under which the role of science and society in tackling this global issue in the future should be prioritized. In this study, a systematic theoretical, technical, and planning analysis was developed in alignment with a Scopus search deployed in the second half of the year 2021 and covering a wide chronological range (from 1970s onwards) and thematic contexts of analysis by using keywords and key phrases organized into two groups. The document results were graphically represented, revealing the main scientific focus of studies. Subsequently, our study investigated the quantitative assessment methods of MPs in marine environments, denoting the range of standard procedures applied for collecting and analyzing samples of water, bottom sediments, and coastal deposits. The technological part of the study includes the presentation of the relevant analytical techniques applied for MPs tracking and monitoring in water resources, determining the wide spectrum of plastic compounds traced. Of particular interest was the determination of environmental depletion and human implications caused, even by extremely low concentrations of MPs, for marine biota, posing potential risks to marine ecosystems, biodiversity, and food availability. Finally, the research proposed the challenges of actions needed to support scientific, industry, policy, and civil society communities to curb the ongoing flow of MPs and the toxic chemicals they contain into water resources, while rethinking the ways of plastics consumption by humanity.

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