Plants use chemical defences to reduce damage from herbivores and the effectiveness of these defences can be altered by biotic and abiotic factors, such as herbivory and soil resource availability. Streptanthus polygaloides, a nickel (Ni) hyperaccumulator, possesses both Ni-based defences and organic defences (glucosinolates), but the extent to which these defences interact and respond to envir...

Prevalence of bat ectoparasites on sympatric Myotis lucifugus and M. septentrionalis was quantitatively characterized in Nova Scotia and New Brunswick by making systematic collections at swarming sites. Six species of ectoparasite were recorded, including Myodopsylla insignis, Spinturnix americanus, Cimex adjunctus, Macronyssu scrosbyi, Androlaelap scasalis, and an unknown species of the genus ...

The large polychaete genus Polycirrus (Terebellida: Polycirridae) is revised based on a morphological study of the type material of most of the approximately 74 nominal species; 59 species, including a new species, P. coibensis n.sp., from the Pacific coast of Panama, are accepted as valid. All characters are reanalysed and discussed in the light of recent phylogenetic studies of terebellomorph...

1Departamento de Biomedicina Molecular, Centro de Investigación y de Estudios Avanzados del IPN, 07000 México, DF, Mexico 2Facultad de Medicina Veterinaria y Zootecnia, UNAM, 04510 México, DF, Mexico 3Facultad de Ciencias Quı́micas, Universidad Autónoma Benito Juárez de Oaxaca, 68120 Oaxaca, Mexico 4Unidad Monterrey, Centro de Investigación y Estudios Avanzados del IPN, 66600 Monterrey, Mexico 5...

Deposit-feeding invertebrates are proposed bioremediators in microbial-driven sediment-based aquaculture effluent treatment systems. We elucidate the role of the sediment reduction-oxidation (redox) regime in structuring benthic bacterial communities, having direct implications for bioremediation potential and deposit-feeder nutrition. The sea cucumber Holothuria scabra was cultured on sediment...

Platonia insignis fruit, popularly known as bacuri, is traditionally used in folk medicine for its anti-inflammatory and antioxidant properties. Therefore, this study determined the chemical composition biological activities of bacuri’s shell seeds extracts, considered residues from consumption industrial uses. Four biflavonoids (GB-2a, GB-1a, morelloflavone, volkensiflavone) were identified ex...

The new lichen species Shackletonia backorii Hal?c?, Güllü & Kahraman is described from James Ross Island, which located in the North-East Antarctic Peninsula region. morphologically most similar to S. insignis (Søchting Øvstedal) Søchting, Frödén Arup, was Livingstone Island (North-West region). These two have a bluish grey blackish thallus with microfruticose and coralloid structure red brown...