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PeerJ. 2019 Aug 13;7:e7493. doi: 10.7717/peerj.7493. eCollection 2019.

The effect of mangrove restoration on avian assemblages of a coastal lagoon in southern Mexico.

Author information

1
Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Ciudad del Carmen, Campeche, México.
2
ATEC Asesoría Técnica y Estudios Costeros SCP, Mérida, Yucatán, México.
3
Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Ciudad de México, México.
4
Centro de Investigación de Ciencias Ambientales, Universidad Autónoma del Carmen, Ciudad del Carmen, Campeche, México.

Abstract

Background:

Mangrove forests provide many ecosystem services, including the provision of habitat that supports avian biodiversity. However, hurricanes can knock down trees, alter hydrologic connectivity, and affect avian habitat. In 1995, Hurricanes Opal and Roxanne destroyed approximately 1,700 ha of mangrove forest in Laguna de Términos, Mexico. Since then, hydrological restoration has been implemented to protect the mangrove forest and its biodiversity.

Methods:

Since avian communities are often considered biological indicators of ecosystem quality, avian diversity and species relative abundance were evaluated as indicators of mangrove restoration success by comparing undisturbed mangrove patches with those affected by the hurricanes. Using bird surveys, similarity analyses, and generalized linear models, we evaluated the effects of water quality variables and forest structure on the relative abundance and diversity of the avian community in disturbed, restored, and undisturbed mangrove patches.

Results:

Higher bird species richness and relative abundances were found in disturbed and restored sites compared to the undisturbed site. After restoration, values of frequency of flooding, water temperature, tree density, and the number of tree species were more similar to that of the undisturbed site than to the values of the disturbed one. Such variables influenced the relative abundance of bird guilds in the different habitat conditions. Furthermore, some insectivorous bird species, such as the Yellow Warbler and Tropical Kingbird, were found to be similarly abundant in both undisturbed and restored sites, but absent or very low in occurrence at the disturbed site.

Conclusions:

Collectively, our results strongly suggest that hydrologic restoration helps to enhance niche availability for different bird guilds, including water and canopy bird species. Our work can help inform management strategies that benefit avian communities in mangrove forests and wetland systems.

KEYWORDS:

Biodiversity; Birds; Coastal wetland; Ecological indicator; Hydrology; Hydroperiod; Laguna de terminos; Rehabilitation

Conflict of interest statement

The authors declare there are no competing interests. Arturo Zaldívar-Jiménez is a mangrove restoration specialist and manager of ATEC Asesoría Técnica y Estudios Costeros SCP.

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