Arcturidae (Isopoda) from the Santa Marta Area, Northern Colombia, with a Review of the Shallow-Water Species from the Caribbean Sea and Gulf of Mexico

Abstract. Hurricanes are complex systems that carry large amounts of energy. Their impact often produces natural disasters involving the loss of human lives and materials, such as infrastructure, valued at billions of US dollars. However, not everything about hurricanes is negative, as hurricanes are the main source of rainwater for the regions where they develop. This study shows a nonlinear analysis of the time series of the occurrence of hurricanes in the Gulf of Mexico and the Caribbean Sea obtained from 1749 to 2012. The construction of the hurricane time series was carried out based on the hurricane database of the North Atlantic basin hurricane database (HURDAT) and the published historical information. The hurricane time series provides a unique historical record on information about ocean–atmosphere interactions. The Lyapunov exponent indicated that the system presented chaotic dynamics, and the spectral analysis and nonlinear analyses of the time series of the hurricanes showed chaotic edge behavior. One possible explanation for this chaotic edge is the individual chaotic behavior of hurricanes, either by category or individually regardless of their category and their behavior on a regular basis.

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Relevance of an integrative approach for taxonomic revision in sponge taxa: case study of the shallow-water Atlanto-Mediterranean Hexadella species (Porifera:Ianthellidae:Verongida)

Invertebrate Systematics ◽

10.1071/is11044 ◽

2012 ◽

Vol 26 (3) ◽

pp. 230 ◽

Cited By ~ 13

Author(s):

Julie Reveillaud ◽

Céline Allewaert ◽

Thierry Pérez ◽

Jean Vacelet ◽

Bernard Banaigs ◽

...

Keyword(s):

Shallow Water ◽

Phylogenetic Reconstruction ◽

Taxonomic Revision ◽

Integrative Approach ◽

Cryptic Species Complex ◽

Surface Network ◽

Natural Toxicity ◽

Shallow Water Species ◽

Water Species

The identification of sponges that lack a mineral skeleton is always highly challenging, especially for Hexadella species, which are also fibreless. Recently, the yellow species Hexadella pruvoti Topsent was identified as a cryptic species complex while the pink coloured Hexadella racovitzai Topsent showed two highly divergent lineages. We performed a COI phylogenetic reconstruction using 27 new Mediterranean Hexadella samples in order to confirm the presence of divergent lineages within both shallow-water species. Specimens were described with an integrative approach combining morphological and cytological investigations, biochemical profiling and assessment of natural toxicity in order to identify diagnostic characters for each taxon. H. topsenti, sp. nov. is distinguished from H. racovitzai by its colour, its surface network shape, divergent secondary metabolite patterns and toxicity values. H. crypta, sp. nov. differs from H. pruvoti by a different encrusting growth form when alive, and by distinctively colouring the ethanol fixative solution. In addition, H. pruvoti and H. crypta show different types of cells with inclusions as well as distinct metabolic fingerprints. Natural toxicity values, however, do not permit the separation of H. pruvoti and H. crypta. Our work shows that only the use of a combination of complementary tools can provide relevant descriptions for some problematic taxa.

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The Gulf of Mexico and the Caribbean Sea

10.1163/9789047406204_017 ◽

2004 ◽

pp. 347-363

Keyword(s):

Gulf Of Mexico ◽

Caribbean Sea ◽

The Caribbean

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Tanaidacea (Crustacea: Peracarida) from Japan. IV. Shallow-water species from Akajima with notes on the recolonization potential of tanaids

Zootaxa ◽

10.11646/zootaxa.1678.1.1 ◽

2008 ◽

Vol 1678 (1) ◽

pp. 1 ◽

Cited By ~ 7

Author(s):

KIM LARSEN ◽

MICHITAKA SHIMOMURA

Keyword(s):

Phylogenetic Analysis ◽

Shallow Water ◽

New Genus ◽

Abundant Species ◽

Two New Species ◽

Sandy Habitat ◽

Nansei Islands ◽

Shallow Water Species ◽

Water Species ◽

Preliminary Phylogenetic Analysis

Two new species of tanaids were collected from colonization traps deployed in a shallow water, sandy habitat off Akajima, Nansei Islands. One new parapseudidaen, Parapseudes arenamans, and one new nototanaidaen genus and species, Paranesotanais longicephalus, are described herein. A preliminary phylogenetic analysis of the closest genera confirms the validity of the new genus and suggests a close affinity between the Leptocheliidae and Nototanaidae. Paranesotanais longicephalus was by far the most abundant species in the habitat. Parapseudes arenamans is faster in colonization of vacant substrate (opportunistic species), while being an inferior competitor to Paranesotanais longicephalus later in succession. A key to Nesotanais and Paranesotanais is provided.

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Fossil and modern sponge fauna of southern Australia and adjacent regions compared: interpretation, evolutionary and biogeographic significance of the late Eocene ‘soft’ sponges

Contributions to Zoology ◽

10.1163/18759866-08501002 ◽

2016 ◽

Vol 85 (1) ◽

pp. 13-35 ◽

Cited By ~ 10

Author(s):

Magdalena Łukowiak

Keyword(s):

New Zealand ◽

Shallow Water ◽

Environmental Context ◽

Late Eocene ◽

Shallow Marine ◽

Marine Communities ◽

Shallow Water Species ◽

Water Species

The late Eocene ‘soft’ sponge fauna of southern Australia is reconstructed based on disassociated spicules and is used to interpret the paleoecology and environmental context of shallow marine communities in this region. The reconstructed sponge association was compared with coeval sponge assemblages from the Oamaru Diatomite, New Zealand, and with the modern ‘soft’ sponge fauna of southern coastal of Australia. Based on the predominance of shallow- and moderately shallow-water species, the late Eocene assemblage is interpreted to have inhabited waters depths of about 100 m. This contrast with the spicule assemblage from New Zealand, which characterized deeper waters based on the presence of numerous strictly deepwater sponge taxa, and the absence of spicules of shallow-water demosponges represented in the Australian material. The southern Australian Eocene sponge assemblages have clear Tethyan affinities evidenced by the occurrence of sponges known today from diverse regions. This distribution suggests much wider geographical ranges of some sponge taxa during the Eocene. Their present distributions may be relictual. The modern sponge fauna inhabiting southern Australian waters shows only moderate differences from these of the late Eocene. Differences are more pronounced at lower taxonomic levels (family and genus).

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Environmental versus genetic causes of morphologic variability in bryozoan colonies from the deep sea

Paleobiology ◽

10.1017/s0094837300003432 ◽

1976 ◽

Vol 2 (2) ◽

pp. 156-165 ◽

Cited By ~ 22

Author(s):

Thomas J. M. Schopf

Keyword(s):

Shallow Water ◽

Deep Sea ◽

Fossil Record ◽

Water Regime ◽

Level Population ◽

Total Variance ◽

Genetic Causes ◽

Single Genotype ◽

Shallow Water Species ◽

Water Species

Bryozoans are colonial animals and this permits the partitioning of their morphologic variability into components of within colony (i.e. within a single genotype) and between colony (i.e. between genotype) variance. These data have been obtained for four species of the endemic deep-sea genus Euginoma for a series of characters. In 8 comparisons, one component of the total variance dominated at the 5% level. Population (between colony) variance contributed significantly to the total variance in 63% of the comparisons (5 of 8); individual (within colony) variance contributed significantly to the total variance in 37% of the comparisons (3 of 8).Compared to shallow water species, the surprising feature of the deep-sea data is that the between colony component of variance is as high as it is. Possibly in the more stable, deep-sea environment, the genotypic contribution to the variance of each individual colony is expressed to a greater degree than in the more variable, shallow water regime. If so, then analyses of variability in colonial animals may be an independent means of ascertaining stability gradients in the fossil record.

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