Living rhodolith beds in the Gulf of California and their implications for paleoenvironmental interpretation

Foster, Michæl S.; Riosmena‐Rodríguez, Rafael; Steller, Diana L.; Woelkerling, W. J.

doi:10.1130/0-8137-2318-3.127

Cited by 83 publications

(119 citation statements)

References 27 publications

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“…In this study, we compare AMS 14 C measurements along a rhodolith growth transect directly with the historical record of invasion of bomb pulse 14 C into the surface ocean from a Galapagos coral, avoiding the reservoir correction problems associated with 14 C dating. Rhodolith beds can be disturbed by human activities such as trawling and dredging (Potin et al 1990;Foster et al 1997), in addition to natural events such as storms, drastic changes in temperatures, and increased turbidity and sedimentation. In spite of our new, higher estimate, these growth rates indicate that the recovery of rhodoliths, the dominant habitat formers in these beds, may be very slow.…”

Section: Discussionmentioning

confidence: 99%

“…Rhodolith beds in these varying locations can occur over many square kilometers, sometimes covering 100% of the subtidal habitat (Foster et al 1997) and provide habitat for organisms that would not otherwise be present, especially other macroalgae, crustaceans, sea stars, anemones, and mollusks (Foster et al 1997). Fossil rhodoliths also form extensive beds throughout the terrestrial portions of Baja California (Dorsey 1997;Foster et al 1997).…”

mentioning

confidence: 99%

“…Rhodoliths, red, nongeniculate calcareous algae, occupy large areas of the world's oceans, forming the basis of diverse and ecologically important communities (Bosence 1983;Foster et al 1997). However, little is known about the rate at which these communities develop, their rate of recovery after natural or anthropogenic disturbances, or their effects on the global carbon budget.…”

mentioning

confidence: 99%

“…of California where the material was collected for this study, rhodoliths occur in a variety of habitats, including 10-30-m deep tidal channels and shallow, rocky areas with mild surf (Foster et al 1997). Rhodolith beds in these varying locations can occur over many square kilometers, sometimes covering 100% of the subtidal habitat (Foster et al 1997) and provide habitat for organisms that would not otherwise be present, especially other macroalgae, crustaceans, sea stars, anemones, and mollusks (Foster et al 1997).…”

mentioning

confidence: 99%

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Growth rate and potential climate record from a rhodolith using 14C accelerator mass spectrometry

Frantz

Kashgarian

Coale

et al. 2000

Limnology & Oceanography

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Rhodoliths, free-living calcareous red algae, create large and diverse habitats worldwide. Although these plants are abundant and ecologically important, little is known about their growth rate. We determined the growth rate for an individual rhodolith, Lithothamnium crassiusculum, from the southern Gulf of California through 14 C analysis using accelerator mass spectrometry (AMS) to be 0.6 mm yr Ϫ1 . This growth rate suggests large L. crassiusculum, which have been found with radii in excess of 6 cm, may live over 100 yr. Declines in the ⌬ 14

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Growth rate and potential climate record from a rhodolith using 14C accelerator mass spectrometry

Frantz

Kashgarian

Coale

et al. 2000

Limnology & Oceanography

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“…When fossilized, such deposits can be used as stratigraphic markers and palaeoenvironmental indicators (Birkett et al, 1998;Foster et al, 1997). Live and dead maerl deposits are being heavily and often unsustainably harvested (over 500,000 tons yearly) as a source of lime and trace elements for agricultural use, as water filtration agents, and as a natural remedy for osteoporosis (Lüning, 1990;Birkett et al, 1998;Guiry & Blunden, 1991;Blunden et al, 1975).…”

Section: Maerl Beds (Eunis A551)mentioning

confidence: 99%

Assessment of goods and services, vulnerability, and conservation status of European seabed biotopes: a stepping stone towards ecosystem-based marine spatial management

et al. 2012

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The goal of ecosystem-based marine spatial management is to maintain marine ecosystems in a healthy, productive and resilient condition; hence, they can sustainably provide the needed goods and services for human welfare. However, the increasing pressures upon the marine realm threaten marine ecosystems, especially seabed biotopes, and thus a well-planned approach of managing use of marine space is essential to achieve sustainability. The relative value of seabed biotopes, evaluated on the basis of goods and services, is an important starting point for the spatial management of marine areas. Herein, 56 types of European seabed biotopes and their related goods, services, sensitivity issues, and conservation status were compiled, the latter referring to management and protection tools which currently apply for these biotopes at European or international level. Fishing activities, especially by benthic trawls, and marine pollution are the main threats to European seabed biotopes. Increased seawater turbidity, dredged sediment disposal, coastal constructions, biological invasions, mining, extraction of raw materials, shipping-related activities, tourism, hydrocarbon exploration, and even some practices of scientific research, also exert substantial pressure. Although some first steps have been taken to protect the European sea beds through international agreements and European and national legislation, a finer scale of classification and assessment of marine biotopes is considered crucial in shaping sound priorities and management guidelines towards the effective conservation and sustainability of European marine resources.

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Invertebrate diversity associated with a shallow rhodolith bed in the Mediterranean Sea (Mar Piccolo of Taranto, south‐east Italy)

Pierri,

Longo,

Falace

et al. 2024

Aquatic Conservation

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Rhodoliths, formed by free‐living coralline algae, are distributed worldwide, and the rhodolith beds (RBs) that they form are recognized as structurally complex habitats. In the Mediterranean, they are generally distributed in the mesophotic zone, at depths of 30–100 m; so far, only a few shallow RBs (<2 m) have been reported (e.g. Îles Kuriat, Tunisia, and Stagnone Marsala, Italy). Here a shallow‐water RB located in the Mar Piccolo of Taranto (south‐eastern Italy, Mediterranean Sea) is described. The diversity of associated invertebrates, the rhodolith‐forming algal species, the type of sediments, and the bed extent are characterized. The RB investigated extends over 5 ha at depths of 0.5–1.5 m. The rhodoliths vary in shape and size, from pralines to large spherical structures, and are formed by a single species, Neogoniolithon brassica‐florida, growing around nuclei of both natural and anthropogenic origin. The associated fauna consisted of 158 taxa, 79 (50%) of which were new basin records. The associated diversity was approximately twice that of the underlying and nearby sediments. The structural complexity of the RBs promotes biodiversity and provides shelter, food, and a breeding ground for numerous species, including seahorses, which are a conservation priority in this basin.

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Living rhodolith beds in the Gulf of California and their implications for paleoenvironmental interpretation

Cited by 83 publications

References 27 publications

Growth rate and potential climate record from a rhodolith using 14C accelerator mass spectrometry

Growth rate and potential climate record from a rhodolith using 14C accelerator mass spectrometry

Assessment of goods and services, vulnerability, and conservation status of European seabed biotopes: a stepping stone towards ecosystem-based marine spatial management

Invertebrate diversity associated with a shallow rhodolith bed in the Mediterranean Sea (Mar Piccolo of Taranto, south‐east Italy)

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