Assessing the Sources and Loadings of Pollutants Affecting Tijuana Estuary
Author : René Langis
Publisher :
Page : 138 pages
File Size : 43,24 MB
Release : 1991
Category : Estuarine ecology
ISBN :
Author : René Langis
Publisher :
Page : 138 pages
File Size : 43,24 MB
Release : 1991
Category : Estuarine ecology
ISBN :
Author :
Publisher :
Page : 328 pages
File Size : 37,60 MB
Release : 1991
Category :
ISBN :
Author :
Publisher :
Page : 338 pages
File Size : 14,97 MB
Release : 1999
Category : Conservation of natural resources
ISBN :
Author :
Publisher :
Page : 630 pages
File Size : 34,3 MB
Release : 1993
Category : Coastal zone management
ISBN :
Author : Nancy Torres
Publisher :
Page : 0 pages
File Size : 42,42 MB
Release : 2023
Category : Coastal ecology
ISBN :
Although the Tijuana River Estuary (TRE) remains the largest, most-intact coastal wetland in Southern California, it has a history of major changes, much of this related to its location immediately north of the US / Mexico Border. One of the primary challenges is cross-border flows from the rapidly growing city of Tijuana, Baja California, Mexico, and the delivery of wastewater, debris, and sediment to sensitive coastal wetland ecosystems. There is a need to more fully investigate these environmental changes to assess the ecosystem health of the Tijuana River Estuary over time, especially related to pollution impacts. This can inform an understanding of changes in both species and stressors, and can also help assess the effectiveness of past management strategies. Since 1986, the NOAA Mussel Watch and California Surface Water Ambient Monitoring Programs have periodically collected data on chemical contaminants and biological indicators of water quality in the TRE. This project builds on these past monitoring efforts and established methodologies to assess status and trends of contaminants in sediment and organisms. This work was accomplished by conducting a thorough review of available datasets and literature to document past changes in the estuary and refine sampling approaches. Sampling was conducted at three locations in the Tijuana River Estuary to assess spatial variability. Compared to national thresholds, most contaminant concentrations were at relatively low levels in 2021, with some having decreased from previously higher levels in the 90s. When comparing species groups, fishes had the highest organic concentrations, indicating the ongoing processes of bioaccumulation and biomagnification. Levels of some organics in fish, such as total DDT and PBDEs, remain at levels which could be of some concern for sensitive piscivorous birds. Also, the highest concentrations were near a local urban outfall point rather than from the Tijuana River itself. Overall, this information improves our ability to document and interpret long-term trajectories of contaminant change in the ambient environment and key taxa. This project's results include communication and management tools depicting the estuary's ecosystem health over time.
Author : Francisco Lara-Valencia
Publisher :
Page : 368 pages
File Size : 25,45 MB
Release : 2002
Category : Environmental agencies
ISBN :
Author : JOY B. ZEDLER
Publisher :
Page : 0 pages
File Size : 23,77 MB
Release : 2018
Category :
ISBN : 9781033165607
Author : Barbara Elaine Kus
Publisher : Franklin Classics Trade Press
Page : 160 pages
File Size : 49,26 MB
Release : 2018-11-11
Category : History
ISBN : 9780353358812
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Author :
Publisher :
Page : 884 pages
File Size : 50,1 MB
Release : 1991
Category : Hydrology
ISBN :
Author :
Publisher :
Page : 722 pages
File Size : 50,91 MB
Release : 1999
Category : Borderlands
ISBN :