Occurrence of the Symbiotic Rhabdocoele Flatworm Paravortex gemellipara in Chesapeake Bay and Gulf of Mexico Molluscs, with Notes on Its Biology and Geographic Range

Estuaries ◽  
1980 ◽  
Vol 3 (2) ◽  
pp. 84 ◽  
Author(s):  
William J. Wardle
Keyword(s):  
Gulf Of Mexico ◽  
Chesapeake Bay ◽  
Geographic Range

Liebig’s Law and Haber’s Tragedy

Dead Zones ◽  
2021 ◽  
pp. 89-105
Author(s):  
David L. Kirchman
Keyword(s):  
Gulf Of Mexico ◽  
Chesapeake Bay ◽  
19Th Century ◽  
Algal Growth ◽  
Oxygen Depletion ◽  
Nitrogen And Phosphorus ◽  
Limiting Nutrient ◽  
Von Liebig ◽  
The Baltic ◽  
Fritz Haber

The fertilizers commonly used by gardeners have many ingredients, but the biggest two are nitrogen and phosphorus, either of which can limit plant and algal growth. The idea that only one nutrient limits growth is encapsulated by Liebig’s Law of the Minimum, named after Justus von Liebig, a 19th-century German chemist. Liebig is also called the “father of fertilizer” because of his work on formulating and promulgating commercial fertilizers. However, he wasn’t the first to discover the Law, and he was wrong about the most important ingredient of fertilizers. This chapter outlines the arguments among limnologists, oceanographers, and geochemists about whether nitrogen or phosphorus sets the rate of algal growth and thus production of the organic material that drives oxygen depletion. The chapter discusses that the limiting nutrient varies with the type of aquatic habitat. In dead zones like the Gulf of Mexico, parts of the Baltic Sea, and Chesapeake Bay, bioassay experiments have shown that nitrogen is usually limiting. The nitrogen necessary for fertilizer and ammunitions comes from the Haber-Bosch process. The chapter reviews the life of one of the two German inventors, Fritz Haber, and how it was full of contradictions if not tragedy.

Taxonomic applications of the esophageal flapper valve in the Genus Neonesidea (Bairdioidea, Podocopida, Ostracoda), including descriptions of new and poorly known species from the Caribbean and Gulf of Mexico

Zootaxa ◽  
2021 ◽  
Vol 4903 (4) ◽  
pp. 451-492
Author(s):  
ROSALIE F. MADDOCKS
Keyword(s):  
New Species ◽  
Gulf Of Mexico ◽  
Geographic Range ◽  
The Bahamas ◽  
Living Species ◽  
The Caribbean ◽  
Three New Species

Species and genera of Bairdiidae can be difficult to discriminate, because of the somewhat limited morphological range of the carapace and limbs and the prevalence of homeomorphy. Attention to the esophageal flapper valve, an uncalcified but relatively well sclerotized structure, may contribute to more reliable identifications. Living species of Neonesidea exhibit sufficient variability in the architecture of this structure to suggest that it may have taxonomic value. Twelve named and three new species are examined to test this premise: N. bacata, N. caraionae n. sp., N. decipiens, N. credibilis n. sp., N. forea n. sp., N. edentulata, N. gerda, N. holdeni, N. longisetosa, N. manningi, N. mediterranea, N. omnivaga, N. plumulosa, N. schulzi, N. tenera. The geographic range of N. gerda is extended across the Gulf of Mexico, while the ranges of N. longisetosa and N. dinochelata are restricted. This supplemental information helps to clarify the relationships of several poorly known species from carbonate environments of Bermuda, the Bahamas, Florida, the Gulf of Mexico, and the Caribbean. 

scholarly journals First record and geographic range extension of the coccolithophore Scyphosphaera apsteinii Lohman, 1902 (Haptophyta: Pontosphaeraceae) from the Pacific coast of Mexico

Check List ◽  
2015 ◽  
Vol 11 (5) ◽  
pp. 1754 ◽  
Author(s):  
Francisco O. López-Fuerte ◽  
Ismael Gárate-Lizárraga ◽  
David A. Siqueiros-Beltrones ◽  
Ricardo Yabur
Keyword(s):  
Gulf Of Mexico ◽  
Type Species ◽  
Pacific Coast ◽  
First Record ◽  
Geographic Range ◽  
Central Pacific ◽  
The West ◽  
The Pacific ◽  
The Caribbean ◽  
First Time

The coccolithophorid Scyphosphaera apsteinii is here reported for the first time from waters off the west coast of the Baja California Peninsula. Scypho­sphaera apsteinii is the type species of the genus Scyphosphaera and had hitherto been recorded only in the Atlantic and Indian Oceans, the Gulf of Mexico, the Mediterranean, and the Caribbean Seas. Specimens were found in samples collected in nets off Isla de Guadalupe in January 2013. This recording thus extends the geographical distribution of S. apsteinii from the Central Pacific (Hawaii) to the Eastern Pacific (NW Mexico).

Dead Zones Discovered in Coastal Waters

Dead Zones ◽  
2021 ◽  
pp. 21-35
Author(s):  
David L. Kirchman
Keyword(s):  
North America ◽  
Gulf Of Mexico ◽  
Chesapeake Bay ◽  
Dead Zone ◽  
The Black Sea ◽  
Low Oxygen ◽  
Coastal Regions ◽  
Dead Zones ◽  
The World ◽  
The Baltic

This chapter describes the discovery of coastal dead zones, such as the Gulf of Mexico and Chesapeake Bay in North America and the Baltic and Black Seas in Europe. Gene Turner sailed out of Pascagoula, Mississippi, in the spring of 1975, on the first of seven cruises that led to the discovery of the Gulf of Mexico dead zone. In the Chesapeake Bay, an unlikely environmentalist, Charles Officer, sounded the alarm in 1984. The biggest dead zone, however, is the Baltic Sea. Even as early as 1969, ecologists feared hypoxia was turning the Baltic into a “biological desert.” The northwest shelf of the Black Sea turned hypoxic in the 1970s, which killed bottom-dwelling fish like goby and flounder. Many coastal regions around the world have low oxygen waters that devastate marine life and habitats. The early studies emphasized one or two of three ingredients—sewage, fresh water, and plant nutrients—thought to be essential in creating a dead zone. This chapter and Chapter 3 discuss these ingredients before revealing which is most important.

scholarly journals West Indian Manatees Use Partial Migration to Expand Their Geographic Range Into the Northern Gulf of Mexico

2021 ◽  
Vol 8 ◽  
Author(s):  
Carl S. Cloyed ◽  
Elizabeth E. Hieb ◽  
Kayla DaCosta ◽  
Monica Ross ◽  
Ruth H. Carmichael
Keyword(s):  
Climate Change ◽  
Gulf Of Mexico ◽  
Range Expansion ◽  
West Indian ◽  
Geographic Range ◽  
Partial Migration ◽  
Geographic Ranges ◽  
Northern Gulf Of Mexico ◽  
Stopover Sites ◽  
Primary Habitat

Partial migration provides a mechanism for species to shift their geographic ranges into new, environmentally favorable regions but has been poorly studied as a means to alleviate effects of climate change. Populations at the edge of their geographic range are ideal to investigate how migratory behaviors may enable range expansion as adjacent areas become more climatically favorable. We determined the contribution of partial migration to the range expansion of West Indian manatees (Trichechus manatus) using GPS data from tagged individuals that migrated between the northern Gulf of Mexico (nGoM) and primary habitat in peninsular Florida. Most of these manatees migrated to the nGoM annually and exhibited high site fidelity among years. Many individuals spent cumulatively more time in the nGoM than in peninsular Florida, indicating the nGoM is a regular part of their geographic range, and they returned to peninsular Florida to meet temperature-related physiological needs for survival. Autumn migrations most frequently terminated at Crystal River, Florida, and manatees that commenced migration late in the season stopped less frequently and had more directed movements. Spring migrations most frequently terminated at Mobile Bay, Alabama, and several manatees quickly and directly migrated from Florida to nGoM stopover sites. Migrations ranged from 10 to 133 days in length, and variation in duration was primarily driven by use of stopover sites and directedness of travel. These data confirm partial migration as an important component of manatee migratory behavior that has already enabled range shifts for manatees on the U.S.A. Gulf of Mexico coast and has potential to facilitate future responses to climate change. As the most common type of migration across the animal kingdom, partial migration may provide a global mechanism for a diverse variety of species to resist the range limiting effects of climate change.

scholarly journals Distribution extension of Glyphobothrium zwerneri Williams & Campbell, 1977 (Tetraphyllidea: Serendipeidae) from the cownose ray Rhinoptera bonasus (Mitchill, 1815) (Myliobatiformes: Myliobatidae) from Campeche, México

Check List ◽  
2014 ◽  
Vol 10 (1) ◽  
pp. 211
Author(s):  
Griselda Pulido-Flores ◽  
Scott Monks
Keyword(s):  
Gulf Of Mexico ◽  
Chesapeake Bay ◽  
Geographic Distribution ◽  
Southern Limit ◽  
Cownose Ray ◽  
Rhinoptera Bonasus ◽  
Wide Range

The collection of four specimens of Glyphobothrium zwerneri extends the geographic distribution of the species from the original locality (Chesapeake Bay, Virginia, U.S.A.) to at least Ciudad del Carmen, Campeche, México, at the southern limit of the Gulf of Mexico. The species is a parasite of Rhinoptera bonasus, a stingray that is thought to migrate within a wide range, suggesting that conservation efforts should be consistent within the stingray’s range, just as is necessary for birds and other species that migrate.

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