The unique biodiversity of most oceanic archipelagos is currently threatened by the introduction alien species that can displace native biota, disrupt ecological interactions, and profoundly affect community structure stability. We investigated threat aliens on pollination networks in species-rich lowlands five Galápagos Islands. Twenty per cent all (60 plants 220 pollinators) pooled network were aliens, being involved 38 interactions. Most insects, especially dipterans (36%), hymenopterans...

The Galápagos ant fauna has long been understudied, with the last taxonomic summary being published almost a century ago. Here, comprehensive and updated overview of known species Islands is provided distributions. list based on an extensive review literature, identification more than 382,000 specimens deposited in different entomological collections, recent expeditions to islands. composed five subfamilies (Dolichoderinae, Dorylinae, Formicinae, Myrmicinae, Ponerinae), 22 genera, 50...

Tropical fire ant (TFA), Solenopsis geminata (Fabricius, 1804), is considered as one of the most serious threats to terrestrial fauna Galápagos, yet little known about its distribution and impact in archipelago. We reviewed literature, studied museum specimens sampled over 62 sites on ten islands islets order update TFA. Since 1980's, species occurrences for TFA have increased from three 115 localities, now recorded seven 11 islets. Sixty-six new records were registered since last review...

Excluding the families Bulimulidae and Succineidae, 27 species of land shells were identified in Galápagos Archipelago (Ecuador), recorded 14 islands.Many are endemic, belonging to Helicinidae (two species), Achatinellidae (two), Pupillidae (four), Vallonidae Strobilopsidae (one), Pristilomatidae Euconulidae (three).The most abundant records found human inhabited islands: Santa Cruz, San Cristóbal, Isabela Floreana.None or genera is exclusive archipelago; only endemic subgenus Strobilops...

Collections of the Charles Darwin Research Station, Royal Belgian Institute Natural Sciences, as well new field samples obtained from several islands on Galapagos yielded records nine ant species for archipelago: Tapinoma sp. HH07, Nylanderia steinheili (Forel, 1893), Crematogaster JTL-022, Pheidole HH01, Tetramorium lucayanum Wheeler, 1905, Strumigenys eggersi (Emery, 1890), Solenopsis HH06, Hypoponera opacior Odontomachus ruginodis Smith, 1937. Currently, known number in is 51, 36 which...

1. We investigated ant communities in all main vegetation zones of the model island S anta C ruz G alápagos archipelago (155 collection points, spread over 21 sites; 28 species collected), and evaluated distribution, coexistence, effect environmental factors a community composed endemic, probably introduced ants N ew W orld exotic origin. 2. Introduced were most frequent, occurring 98% samples, yet endemic still occurred 54% constituted one three common species. The present study revealed...

The first record and distribution of the bigheaded ant, Pheidole megacephala (Fabricius 1793) in Galápagos Islands are reported. Major minor workers have been collected towns Puerto Baquerizo Moreno (San Cristóbal Island), Ayora (Santa Cruz Villamil (Isabela Island) highlands San Cristóbal. Field surveys a revision Formicidae collection Invertebrates at Charles Darwin Research Station (ICCDRS), California Academy Sciences (CAS) Royal Belgian Institute Natural (RBINS) suggest that this...

The thelastomatoid pinworm fauna (Nematoda: Oxyurida: Thelastomatoidea) was surveyed in 3 endemic species and 6 introduced of cockroach hosts (Insecta: Blattaria) the Galápagos Islands, Ecuador. A total 658 host specimens were examined from preserved collections that had been collected between 1966 2003 7 islands archipelago. Eight pinworms identified these hosts, including dominant Cephalobellus ovumglutinosus a Severianoia sp. as well Leidynema appendiculata, Hammerschmidtiella diesingi,...

The Galápagos ant fauna has long been understudied, with the last taxonomic summary being published almost a century ago. Here, we provide comprehensive and updated overview of known species Islands distributions. list is based on an extensive review literature, identification more than 382,023 specimens deposited in different entomological collections, as well recent expeditions to islands. composed five subfamilies (Dolichoderinae, Dorilynae, Formicinae, Myrmicinae Ponerinae), 22 genera 53...

Urban ecosystems house artificial infrastructures such as ports, transport stations and commercial centres which are often introduction foci for exotic species.The connectivity of these structures to other specialised in commodity flows located urban cores, enhances the accidental spreading species can become invasive.Despite this fact, targeted investigations detect establishment invasive tropical landscapes lacking.A survey conducted on ant communities 15 cities throughout Côte d'Ivoire...

Las Islas Galapagos son de gran importancia debido a su papel en los albores y la consolidacion del modelo evolucion darwiniano (Sulloway 1982); origen geologicamente reciente ubicacion oceanica convierten un laboratorio natural para el estudio muchos procesos evolutivos ecologicos (Schluter 1986, Grant & 2009). Como consecuencia, varios grupos organismos, como vertebrados, han sido ampliamente estudiados (De Roy 2009, Steadman 2009); sin embargo, preguntas basicas riqueza las islas...

In the present work we report first occurrence of entomogenous fungus Hirsutella saussurei, in Galápagos Islands, and also evidence this parasitizing a new host: invasive paper wasp Polistes versicolor. Some wasps parasitized by were found Santa Cruz island 2018 2019, while two specimens Floreana 2019. Our data enlarge both geographical distribution host range. Even though P. versicolor is considered an important threat for Galapagos endemic fauna, it necessary deep research to know if H....

Land modification causes biodiversity loss and ecosystem modification. Despite many studies on the impacts of this factor, there is little empirical evidence how it affects interaction networks plants, herbivores their natural enemies; likewise, those change due to differences in complexity communities they comprise. We analyzed effects land use number trophic levels exotic legume species associated arthropods. collected seedpods from five (one them invasive) four types (urbanization,...

In the Galapagos Islands, invasive wasps negatively affect local fauna through competition with native predators.These also pose a risk to humans because of their stings.Thus, it is important constantly survey these insects.Currently there are three species vespids known from Galapagos: two social invasive, while solitary cryptogenic.After structured sampling using malaise traps, hand nets, and pan traps on most islands archipelago, review related collections, distribution Brachygastra...

Azotidae (Hymenoptera: Chalcidoidea) is a small family (1 genus, 92 species) comprised primarily of hyperparasitoids species Hymenoptera that target whiteflies and scale insects. In the present study, we provide first record genus Ablerus Howard, 1898 (=Azotus Howard 1898) from Galapagos Islands, based on material collected in survey across archipelago’s main islands. One new species, byroni sp. n. described illustrated.

Very little is known about the sand wasp, Bicyrtes variegatus , in Galápagos archipelago. In this study, we compiled information from surveys, museum collections and literature to better understand its distribution ecology. We found records of B. on seven islands with earliest record 1964, San Cristóbal Island. Wasps have been collected littoral, arid, transition humid vegetation zones reported visiting endemic, native, cryptogenic, introduced plants. Sun dances a tight cluster wasps,...

Despite the significance of Galapagos archipelago, richness diverse groups such as braconid wasps remains poorly studied. Seven species chelonine Braconidae are recorded for islands first time: Chelonus buscki Viereck, 1912, carinatus Provancher, 1881, johni Marsh, 1979, refluus (Papp, 2010), sulcifera 2016), topali 1999), and turgoclarus 2010). No endemic were identified islands. We also explore island population differences with respect to area, age, distance between The populations C....

Two new distribution records for species of Bruchinae (Coleoptera: Chrysomelidae) from the Galapagos Islands are reported and discussed: Acanthoscelides machala (Johnson, 1990), macrophthalmus (Schaeffer, 1907). We also report two host plant associations: A. in Senna obtusifolia (L.) H.S. Irwin & Barneby (Fabaceae), Scutobruchus ceratioborus (Philippi, 1859) Leucaena trichodes (Jacq.) Benth. (Fabaceae). Finally, we provide a revised checklist their associated plants.