Report of the Committee on Paleoecology, 1936-1937; Presented at the Annual Meeting of the Division of Geology and Geography, National Research Council, May 1, 1937 (1937) / Chapter Skim
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An Ecological Cross-Section of the Lower Part of Florida Based Largely upon its Molluscan Fauna - Paul Bartsch
An Ecological Cross-Section of the Lower Part of Florida Based Largely upon its Molluscan Fauna - Paul Bartsch
Pages 11-25
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From page 11... ...
'-'i-f'.'.* • "„' I have always felt that paleontologists, before entering this specialized branch of science, should have a thorough basic training in Botany and Zoology, and in the latter field stress not the histo-physiological phase, but the field studie.s, Ecology, the adjustment of organisms to their fellow creatures as well'as, physical environment,, •• .
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From page 12... ...
Helisoma duryi seminole Pils.
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From page 13... ...
. , Should one fly over the region he would see 'an endless number of slender liquid threads, usually combining into larger leads, which eventually form channels of canoeable size, but the land is so flat that often as not they are mere slender openings in the shallow fields without current or flow.
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From page 14... ...
This will contain the mollusks common to the Deciduous Tree Association. The Deciduous Tree Association This frequently forms dense tangles interlaced with vines and shrubs to form almost impenetrable thickets.
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From page 15... ...
..'U the favorite haunts 6'f th«3 meadow lark, where at times we may find the ground fairly swarming withs •''•''"•' '•' •' ••:• ' Succinea floridana Pils. Polygyra septemvolva volvoxis (Pfr,)
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From page 16... ...
The Mainland Hurricane Rampart At the southern end of the peninsula, stretching westward from Flamingo City through East, Middle and West Cape Sable, we have a huge sand dune varying in width from a dozen yards to the length of a city block. This represents the wave combings from the shallow floor of the Bay of Florida piled high and dry by Hurricanes and other winds.
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From page 17... ...
r '.-'•: ..: K- . Bordering the southern end of Biscayne Bay> on the mainland, we :..:..:'..havejquite a stand of B^ack Mangrove trees", south of, and here and there among these, stretches of fine sharp sand mixed with vegetable detritus and the combing of the waves; here under old decaying logs :or boards when these are turned over, we are sure to find caches of thousands of specimens of the beautiful, small, Truncatolla caribaeus Rve, and T^imcateLLa •jV pilabiatus Pfr, and Melampus fjoridanus Shuttl.
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From page 18... ...
* Ostrea virginica Gmelin Barnea costata Linnaeus Halimeda Association Some of the shallow water flats are covered by an almost pure stand of the calcareous alga Halimeda.
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From page 19... ...
nity and he has used it in bringing here things beautiful from everywhere. The shallow cuts which in days of old made you wait for a high tide to slip across the bar, even in a moderate-draft boat, have been widened and deepened to admit shipping of all kinds, and that these channels may not be filled by the ever southward shifting sharp sands of the outer beaches, long ripraps with stone facing have been placed on the north side of the cuts to shunt the sands eastward into deep waters.
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From page 20... ...
On the. inner edges the funereal- -Tournefortia holds sways and forming the outer edge 'of the'-woods,-the sea grape with its leathery, shining, kidney-shaped leavs&.and.pe&dant racemes of fruit, makes a characteristic setting enjoyed by Cerion incanum Binney.
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From page 21... ...
. • Coral Reef Walls Offshore, beyond Hawk Channel, which stretches outside of the keys from Miami south to Key West, is another submerged ridge, which at intervals bears a series of lighthouses.
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From page 22... ...
Here the Hog fish and various species of garishly colored Parrot Fish and Slippery Dicks and the burrowing Gnathops and the Stingaree and sometimes Manta birostris find a suitable habitat, and the long-spined Black Sea Urchin, Centrechinus antillarum Phil., whose contact one should avoid, nay live singly or in bunches of several dozens. At home here also are: Dosinia elegans Conrad Anodontia alba Link Oliva sayana Ravenel Polinices duplicata Say Natica canrena L
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From page 23... ...
Grassy Patches -- -- •• -- • -- • • g • • (-• Betwixt the Coral walls and the Gorgonian fields we may have long stretches of grass covered sand bottom, composed of the Sea Grass, Thalassiaj among which the trunklike Cowfish, Pipe Fishes, and the Sea Horses dwell* This, too, is the favorite habitat of the red Giant Star Fish, Oreaster reticulata L., and Tripneustes esculentus Lo, and the Giant Horse Conoh, FascjiQlaria gigantea Kiener, the largest Gastropod of the Atlantic, and Fasciolaria tulipa L., as well as the King and Queen Conchs, Caggig madagascarensis Lam., Cassis tuberosa L., and above all the Pink Conch, Strombus gigas L., whose delicious flesh has gained the name "Conch" for those devoted to this fish.
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From page 24... ...
may mention: Area glomerula Dall '.; •'•" Euciroa elegantissima Dall Acteon exilis Jeffreys Protocardia peramabilis Dall •'Modibla Polita Verrill & Staith Leucosyrinx verrillii Dall Leucasyrinx subgrandifera Dall '... •• '"•> Ancistrosyrinx elegans Dall • i '•: ,..: .• Ancistrosyrinx radiata Dall • -1 Genota.
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From page 25... ...
This killing off occasionally is also due to the presence of Pseudomonas, likewise a flagellate protozoan .whose contribution of ammonia to the sea causes enough disbalance to produce sufficient chemically precipitated ooze, suspended in the :water and on the bottom also, to choke all life, . :.,:-• •'.':e In this brief account I have purpbsely avoided mentioning the numerous minute species of the families Epitoniidae, Melaneliidae, Pyrami -- dellidae, Caecidae, Rissoidae, Tripheridae, Cerithiopsidae, Vitrinellidae and others, since these are not the obvious things of the fauna0 I have selected those mollusks which force their attention upon the observer in each habitat; they, therefore, represent'the striking element of each association.
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