[MARMAM] New publication: In‐Water Bridge Construction Effects on Manatees with Implications for Marine Megafauna Species

Elizabeth Hieb ehieb at disl.org
Mon Mar 15 08:14:52 PDT 2021

On behalf of all co-authors, we are pleased to share our recent publication:

Hieb, E.E., E.A. Eniang, L.W. Keith-Diagne, and R.H. Carmichael. 2021.
In‐Water Bridge Construction Effects on Manatees with Implications for
Marine Megafauna Species. The Journal of Wildlife Management 1–12; 2021.
DOI: 10.1002/jwmg.22030.

To request a copy of the paper, please contact ehieb at disl.org.

Abstract:  Globally, increasing coastal development requires construction
and maintenance of transportation infrastructure that affects terrestrial
and aquatic ecosystems. Construction of bridges as part of transportation
networks introduces a series of risks to aquatic species near construction
zones. We reviewed relevant literature and obtained exemplary case studies
to synthesize potential effects of bridge construction on the West Indian
manatee (Trichechus manatus), a nearshore megafauna species vulnerable to
human activities. Stages of bridge construction including dredging, pile
driving, and installation and assembly of bridge components each involve
potential direct and indirect effects on manatees. Direct effects such as
vessel interactions, entanglement or ingestion, and entrainment may result
in acute physical injury or mortality. Indirect effects from construction
such as habitat obstruction or degradation and increased noise from
construction activities can alter behavior and intraspecies communication
and reduce access to essential resources. Some effects of construction may
be immediately difficult to quantify, but cumulative effects through time can
result in major habitat and species loss. To prevent large‐scale negative
effects of construction on manatees and other aquatic species, use and
evaluation of mitigation strategies should be implemented pre‐, during, and
post‐construction. As the global human population increasingly occupies
coastal zones, effective planning of coastal development, including bridge
and other in‐water construction, will be essential to support conservation
and recovery efforts for manatees and other species at risk in these areas.

Elizabeth Hieb, M.S.
Dauphin Island Sea Lab
Manatee Sighting Network
Research Technician
101 Bienville Blvd.
Dauphin Island, AL 36528
Phone: (251) 861-2141 ext.7547

This document, including any attachments, contains privileged and/or
confidential information. You may neither use, copy, nor deliver to anyone
this document or any of its contents or attachments.  All data (broadly
defined as but not limited to numerical, descriptive, narrative, image,
biological or environmental samples, raw or summary data, or any other
content herein) belong to the Alabama Marine Mammal Stranding Network
(ALMMSN) and/or the Manatee Sighting Network under the auspices of the
Dauphin Island Sea Lab (DISL) as an agent of the state of Alabama.  Use of
these data in any form must be requested and approved by contacting
Dr. Ruth H. Carmichael (rcarmichael at disl.org),. ALMMSN/MSN and DISL reserve
the right to review, comment and consult on all data sharing and requests
for data use.  All data use, including analyses and products of any kind
(print, oral, visual, archival, internal or external), after approval,
must acknowledge and properly cite the DISL, ALMMSN and/or MSN, and
data-specific personnel (that may include but not be limited to students,
staff, faculty or administrators who contributed data).  Approved data
users must request the most up-to-date citation from Dr. Carmichael
immediately prior to each use.
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