Journal of Phycology

Cover image for Vol. 51 Issue 4

Edited By: Debashish Bhattacharya, Michael Graham, Arthur Grossman, Jonathan Zehr

Impact Factor: 2.844

ISI Journal Citation Reports © Ranking: 2014: 11/102 (Marine & Freshwater Biology); 43/200 (Plant Sciences)

Online ISSN: 1529-8817

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  • Ecological niche models of invasive seaweeds

    Ecological niche models of invasive seaweeds

    Schematic overview of the process of ecological niche modeling. The environmental conditions where species occur are extracted from GIS environmental data sets using the geographic coordinates of species occurrences. Based on the information about the species’ environmental preferences, a model is then optimized. The model and the environmental maps can subsequently be used to predict the habitat suitability of every location on the map. Inspired by a figure from Elith and Leathwick ().

  • A molecular evaluation of the Liagoraceae sensu lato (Nemaliales, Rhodophyta) in Bermuda including Liagora nesophila sp. nov. and Yamadaella grassyi sp. nov.

    A molecular evaluation of the Liagoraceae sensu lato (Nemaliales, Rhodophyta) in Bermuda including Liagora nesophila sp. nov. and Yamadaella grassyi sp. nov.

    Liagora mannarensis (TRP 12-42-3): (A) Habit of live specimen, scale bar 2 cm; (B) Carpogonial branch (arrow), scale bar 20 μm; (C) Division of the carpogonium from both the proximal and distal cells of the first transverse division (arrows indicate distally divided cells), scale bar 10 μm; (D) Fusion cell (arrow), scale bar 20 μm; (E) Carposporophyte with sterile filaments, scale bar 40 μm. Liagora nesophila sp. nov.: (F) Habit of holotype specimen (CWS/CEL 8-5-9), scale bar 2 cm; (G) Habit of live specimen (TRP 12-28-3), scale bar 1 cm; (H) Branch tip showing cortical fascicles (CWS/CEL 6-22-4), scale bar 100 μm; (I) Early developing distal gonimoblasts with unfused carpogonial branch (arrowheads) and developing sterile filaments (holotype, CWS/CEL 8-5-9), scale bar 20 μm; (J) Gonimoblasts emerging from distal end of fusion cell (arrow) and developing sterile filaments (holotype, CWS/CEL 8-5-9), scale bar 20 μm; (K) Carposporophyte showing extensive sterile filaments (TRP 12-47-2), scale bar 100 μm; (L) Spermatangia (arrowheads) (TRP 12-28-3), scale bar 30 μm.

  • Caldora penicillata gen. nov., comb. nov. (Cyanobacteria), a pantropical marine species with biomedical relevance

    Caldora penicillata gen. nov., comb. nov. (Cyanobacteria), a pantropical marine species with biomedical relevance

    Environmental pictures illustrating morphological variability in shape and coloration between different Caldora penicillata specimens. Note external parts of specimens vary in color between reddish, greenish, to orange, while internal bases are always whitish or colorless. (a) Amorphic puffball-shaped specimen (BCBC11-25) growing on gorgonians of South Water Cay, Belize. (b) Small puffball-shaped tufts of C. penicillata attached to corals. (c) C. penicillata with feathery morphology and red coloration growing on shallow coral reef at Looe Key, FL (courtesy of B. Lapointe). (d) C. penicillata on coral reef at Carrie Bow Cay, Belize (courtesy of A. Wood). (e) C. penicillata on gorgonians of Miskito keys, Honduras (courtesy of Z. Foltz). (f) Greenish C. penicillata specimen (NAB11-29) on hard-bottom on a shallow-water reef of Lac Bay, Bonaire.

  • Defense mechanisms of sargassacean species against the epiphytic red alga Neosiphonia harveyi

    Defense mechanisms of sargassacean species against the epiphytic red alga Neosiphonia harveyi

    (A–D) The hand sections of Sargassum siliquastrum blades stained by Evans blue. When the blades were heated at 40°C for 30 min, the epidermal cells stained blue in the blades cultured for 0 d (A) and 7 d (B). If untreated, the epidermal cells were not stained in the blades cultured for 0 d (C) and 7 d (D); scale bars = 20 μm. (E-H) Light microscopy (E and G) and fluorescent microscopy (F and H) of the paraffin sections of the sargassacean blades where Neosiphonia harveyi spores germinated. In S. patens (E and F), there was no morphological change in the basiphyte tissue where the epiphyte infected (arrow). In S. siliquastrum (G and H), some medullary cells (asterisks) around the rhizoid (arrow) were merged with adjacent cells. Peeled epidermal layer was observed on the blade surface (arrowheads); scale bars = 50 μm.

  • Biodiversity of Klebsormidium (Streptophyta) from alpine biological soil crusts (Alps, Tyrol, Austria, and Italy)

    Biodiversity of Klebsormidium (Streptophyta) from alpine biological soil crusts (Alps, Tyrol, Austria, and Italy)

    Morphotypes of Klebsormidium from alpine soil crusts: (a–c) K. flaccidum (ASIB V100), (d–f) K. cf. flaccidum (KUE1), (g–j) K. elegans (PIT3), (k–n) K. crenulatum (SAG 2415). (a, b, d, e, g, i, m) Filaments of young (2–3 weeks old), and (c, f, h, g–l, n) filaments of old (2–3 months old) cultures; scale bars: 10 μm.

  • Ecological niche models of invasive seaweeds
  • A molecular evaluation of the Liagoraceae sensu lato (Nemaliales, Rhodophyta) in Bermuda including Liagora nesophila sp. nov. and Yamadaella grassyi sp. nov.
  • Caldora penicillata gen. nov., comb. nov. (Cyanobacteria), a pantropical marine species with biomedical relevance
  • Defense mechanisms of sargassacean species against the epiphytic red alga Neosiphonia harveyi
  • Biodiversity of Klebsormidium (Streptophyta) from alpine biological soil crusts (Alps, Tyrol, Austria, and Italy)

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