Archivos de Diario para marzo 2018

07 de marzo de 2018

Summer!

Randalls Island looks particularly beautiful in summer. Wildflowers are flowering, the gardens are blooming, there are chickens on the farm, and butterflies are on the wing.

Please consider exploring our lovely island, especially our natural areas. There are still so many organisms here that have not yet been observed and recorded.

On Saturday June 23 we held our our “Small Worlds” nature-walk event. Although the weather was unseasonably chilly, we successfully explored some of the invertebrate communities that thrive in and around Randalls Island, and we documented them on iNaturalist.

We are looking forward to your observations whenever you come over to visit,

Thanks.

Anotado en marzo 07, miércoles 19:10 por susanhewitt susanhewitt | 0 comentarios | Deja un comentario

05 de marzo de 2018

Mollusks from Randall's Island, an update

RANDALL’S ISLAND, MANHATTAN, NYC, US
MOLLUSKS

From April 2017 to March 2018. The marine species were (all but one) found by me. Cedric Lee found many of the most interesting terrestrial species, and the Succinea sp. was found by Danny Molinaro, who was then part of the Natural Areas Management team of RIPA.

Note: species in square brackets may or may not actually live in the estuary around the island.

[NOTE: Two recent additions are in capital letters]

PART I - MARINE/ESTUARINE MOLLUSKS
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MARINE AND ESTUARINE BIVALVES:

Mytilus edulis, Blue Mussel -- fresh dead
Geukensia demissa, Atlantic Ribbed Mussel -- live
Argopecten irradians, Bay Scallop - few old valves
Crassostrea virginica, Eastern Oyster -- live
[Astarte castanea, Smooth Astarte -- one old dead valve]
Mulinia lateralis, Dwarf Surfclam -- live
[Spisula solidissima, Atlantic Surfclam -- one broken piece]
Ensis directus, Atlantic Jackknife Clam -- live
Macoma balthica, Baltic Macoma -- live
Macoma tenta, Shining Macoma -- one shell, paired valves
Ameritella agilis, Northern Dwarf-tellin -- live
Angulus versicolor, Many-colored Tellin -- one shell, paired valves
TAGELUS PLEBEIUS, STOUT TAGELUS -- ENTIRE SHELL OF JUVENILE
Mercenaria mercenaria, Hard Clam -- live
Mya arenaria, Softshell Clam -- live
Rangia cuneata, Atlantic Rangia -- single valves
Cyrtopleura costata, Angelwing -- fragment, juvenile
Teredinidae family, Shipworms -- many
Lyonsia hyalina, Glassy Lyonsia -- a number of paired valves
Total 18

MARINE GASTROPODS: 

Littorina littorea, Common Periwinkle -- live
Assiminea succinea, Atlantic Assiminea -- live
Crepidula convexa, Convex Slippersnail -- two shells
Crepidula fornicata, Common Slippersnail -- juvenile shell
Crepidula plana, Eastern White Slippersnail -- live
Neverita duplicata, Shark Eye -- several
Urosalpinx cinerea, Atlantic Oyster Drill -- several
[Busycon carica, Knobbed Whelk -- juvenile shells]
Tritia obsoleta, Eastern Mudsnail -- live
Boonea bisuturalis, Two-Groove Odostome -- live (one)
Haminoea solitaria, Solitary Glassy-bubble -- several
Melampus bidentatus, Eastern Melampus -- live
Myosotella myosotis, Mouse-ear Ovatella -- live
Total 12

NOTE: I am not including here all of the exotic species I have found – shells that were presumably brought to the island by humans and then left here for a variety of reasons.
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RANDALL’S ISLAND MOLLUSKS - PART II - FRESHWATER & LAND

FRESHWATER GASTROPODS:

Physa sp., -- Live in freshwater pond
Viviparus georgianus, -- one worn shell on Wards Island beach
Dreissena bugensis, -- one intact fresh-dead shell, Wards Island beach, inside an oyster shell – possibly this species is now invading estuarine waters?
Total 3

LAND GASTROPODS, SNAILS AND SLUGS:

Cepaea nemoralis, Grove Snail -- many colonies
Deroceras reticulatum, Milky Slug -- several live
Deroceras sp., -- few
Oxychilus draparnaudi, Draparnaud’s Glass-snail -- live
VALLONIA COSTATA, RIBBED GRASS-SNAIL -- LIVE
Vallonia excentrica, Eccentric Grass-snail -- live
Arion intermedius, Hedgehog Slug -- live
Zonitoides nitidus, Shiny Glass-snail -- live
Zonitoides arboreus, Quick Gloss Snail -- dead
Cochlicopa lubrica, Slippery Moss Snail -- live, fairly common
Discus rotundatus, Rounded snail -- common live

Vertigo pygmaea, Common Whorl-snail -- live, one colony
Hawaiia miniscula, Minute Gem -- live, one colony
Paralaoma servilis, Pinhead Spot Snail -- live, one colony
Succinea sp., Amber snails -- one live
Total 13
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Specialized salt marsh species living in the Little Hell Gate Salt Marsh

**Assiminea succinea, Atlantic Assiminea -- many
Melampus bidentatus, Two-toothed Marsh Snail -- many
Myosotella myosotis, Mouse-eared snail -- many
Total 3

**Please note that the Assiminea succinea is actually listed twice, as a land snail and as a marine snail, however, it is not counted twice.

GRAND TOTAL OF MOLLUSKS, April 2017 to March 2018, 48 species

Anotado en marzo 05, lunes 17:31 por susanhewitt susanhewitt | 12 observaciones | 4 comentarios | Deja un comentario