Jochen Drescher
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Two new species and three new records of the cobweb spider Platnickina (Araneae, Theridiidae) from Sumatra Open
Two new species of spiders of the genus Platnickina Koçak & Kemal, 2008 are described from Sumatra, Indonesia: Platnickina harapan Dhiya’ulhaq, sp. nov. (♂♀) and Platnickina debu Dhiya’ulhaq, sp. nov. (♂♀). Three species are recorded for t…
Taxonomic notes on the crab-spider genera Nyctimus Thorell, 1877 and Zametopina Simon, 1909 (Araneae, Thomisidae) with descriptions of six new species from Southeast Asia Open
The crab-spider genera Zametopina Simon, 1909 and Nyctimus Thorell, 1877 remain poorly studied, with significant gaps in their taxonomic understanding. Nyctimus has seen little study since its original description, and species assignments …
Eleven new species of jumping spiders (Araneae, Salticidae) from Sumatra Open
Eleven new species of jumping spiders (Araneae: Salticidae) from Jambi Province, Sumatra, Indonesia, are described: Chalcovietnamicus tikus Dhiya’ulhaq sp. nov. (♂♀), Dendroicius garigi Dhiya’ulhaq sp. nov. (♂), Epeus kepayang Dhiya’ulhaq …
Riparian zones offset community decline in true flies (Diptera) after lowland rainforest conversion to smallholder cash crops in Sumatra Open
Tropical land-use change is a major driver of global biodiversity loss, yet its effects on flies (Diptera) remain underexplored, particularly in Southeast Asia. The present study addresses this knowledge gap by comparing Diptera abundance,…
Expanding the taxonomy of crab spiders (Araneae, Thomisidae) in Sumatra: a new genus, five new species, and regional records Open
The taxonomy of crab spiders (Thomisidae) has been the focus of many reviews, adding new genera such as Ibana and Crockeria while synonymising Ascurisoma with Cebrenninus , and describing many new species. A collection of crab spiders from…
Trophic Change and Community Decline in Acrobat Ants After Rainforest Conversion to Cash Crops Open
The conversion of tropical rainforests to agriculture causes population declines and biodiversity loss across taxa. This impacts ants (Formicidae), a crucial tropical group for ecosystem functioning. While biodiversity loss among ants is w…
View article: Unveiling the above-ground eukaryotic diversity supported by individual large old trees: the “Life on Trees” integrative protocol
Unveiling the above-ground eukaryotic diversity supported by individual large old trees: the “Life on Trees” integrative protocol Open
Large tropical trees are rightly perceived as supporting a plethora of organisms. However, baseline data about the variety of taxa coexisting on single large tropical trees are lacking and prevent a full understanding of both the magnitude…
Spiders of Jambi: A guide to the EFForTS collection Open
Spiders are excellent predators of considerable ecological importance, consuming roughly half a billion tons of animal prey annually worldwide. Some are also great architects, constructing elaborate capture webs dozens of times their size.…
Four new species of Utivarachna Kishida, 1940 (Araneae: Trachelidae) from Sumatra Open
Four new species of trachelid spiders belonging to the genus Utivarachna Kishida, 1940 are described: U. angsoduo sp. nov., U. balonku sp. nov., U. rimba sp. nov., and U. trisula sp. nov. Part of the EFForTS project, the spider specimens w…
View article: Rainforest transformation reallocates energy from green to brown food webs
Rainforest transformation reallocates energy from green to brown food webs Open
Terrestrial animal biodiversity is increasingly being lost because of land-use change 1,2 . However, functional and energetic consequences aboveground and belowground and across trophic levels in megadiverse tropical ecosystems remain larg…
Rainforest conversion to plantations fundamentally alters energy fluxes and functions in canopy arthropod food webs Open
Tropical rainforests around the world are rapidly being converted into cash crop agricultural systems. The associated massive losses of plant and animal species lead to changes in arthropod food webs and the energy fluxes therein. These ch…
Rainforest conversion to plantations fundamentally alters energy fluxes and functions in canopy arthropod food webs Open
Tropical rainforests around the world are rapidly converted into cash crop agricultural systems. The associated massive losses of plant and animal species lead to changes in arthropod food webs and the energy fluxes therein. These changes …
View article: Densities, biomasses, body masses of canopy and soil arthropods, birds, and earthworms from rainforest and plantations in Sumatra, Indonesia
Densities, biomasses, body masses of canopy and soil arthropods, birds, and earthworms from rainforest and plantations in Sumatra, Indonesia Open
The dataset represents raw data and R code used in the publication "Rainforest transformation reallocates energy from green to brown food webs". The data was collected in Jambi province, Sumatra, Indonesia from rainforest, jungle rubber, r…
View article: #GlobalCollembola - full sample-level database
#GlobalCollembola - full sample-level database Open
Here, we present a global, spatially-explicit database on springtail communities that includes 249,912 occurrences from 44,999 samples and 2,990 sites. These data are mainly raw sample-level records at the species level collected predomina…
View article: Densities, biomasses, body masses of canopy and soil arthropods, birds, and earthworms from rainforest and plantations in Sumatra, Indonesia
Densities, biomasses, body masses of canopy and soil arthropods, birds, and earthworms from rainforest and plantations in Sumatra, Indonesia Open
The dataset represents raw data and R code used in the publication "Rainforest transformation reallocates energy from green to brown food webs". The data was collected in Jambi province, Sumatra, Indonesia from rainforest, jungle rubber, r…
View article: #GlobalCollembola - full sample-level database
#GlobalCollembola - full sample-level database Open
Here, we present the first global, spatially-explicit database on springtail communities that includes 249,912 occurrences from 44,999 samples and 2,990 sites. These data are mainly raw sample-level records at the species level collected p…
Rainforest conversion to smallholder cash crops leads to varying declines of beetles (Coleoptera) on Sumatra Open
Southeast Asian arthropod biodiversity is in rapid decline, but the variability of responses within taxa has received little attention. Using canopy fogging, we collected ~50,000 beetles (Coleoptera) in (1) lowland rainforest, (2) jungle r…
Rainforest conversion to rubber and oil palm reduces abundance, biomass and diversity of canopy spiders Open
Rainforest canopies, home to one of the most complex and diverse terrestrial arthropod communities, are threatened by conversion of rainforest into agricultural production systems. However, little is known about how predatory arthropod com…
Uncovering cryptic diversity in the enigmatic ant genus Overbeckia and insights into the phylogeny of Camponotini (Hymenoptera : Formicidae : Formicinae) Open
Many tropical insect species remain formally undescribed, and the validity of some rarely collected and poorly studied taxa is uncertain. Overbeckia Viehmeyer, 1916 is a monotypic ant genus and a rare member of the arboreal ant communities…
Guidebook of Beetles and Weevils of Jambi, Sumatra, Indonesia (Chrysomelidae, Curculionidae, Elateridae, and Staphylinidae) Open
Indonesia is known to be the home of an incredibly biodiverse fauna, with thousands and thousands of amazing animal species. This is particularly true for the Arthropoda, which is the phylum of multi-legged invertebrates such as insects, s…
Rainforest conversion to cash crops reduces abundance, biomass and species richness of parasitoid wasps in Sumatra, Indonesia Open
Parasitoid wasps affect herbivory in natural and agricultural ecosystems, including cash crops. The impacts of rainforest transformation to rubber and oil palm on parasitoid wasp communities are poorly understood. We collected canopy arthr…
A Guide to the Ants of Jambi (Sumatra, Indonesia): Identification Key to Ant Genera and Images of the EFForTS collection Open
Ants are tiny creatures that are often overlooked in our everyday lives. Yet, there are more than 15.000 species of ants on Earth, and their total biomass is higher than that of all humans combined. They invented agriculture more than 50 m…
Rainforest conversion to monocultures favors generalist ants with large colonies Open
The conversion of natural ecosystems to agricultural land is one of the most important drivers of biodiversity decline worldwide, particularly in the tropics. Species loss is typically trait‐associated, leading to filtering of disturbance‐…
Effects of rainforest transformation to monoculture cash crops on soil living ants (Formicidae) in Jambi Province, Sumatra, Indonesia Open
Ants (Formicidae) are fundamental components of almost every terrestrial ecosystem, especially in the tropics. While epigaeic ants are extensively studied, hypogaeic, soil living ants are still neglected to a large extent. To remedy this, …
Changes in diversity and community assembly of jumping spiders (Araneae: Salticidae) after rainforest conversion to rubber and oil palm plantations Open
Rainforest conversion into monoculture plantations results in species loss and community shifts across animal taxa. The effect of such conversion on the role of ecophysiological properties influencing communities, and conversion effects on…
Diversity of butterflies (Lepidoptera) across rainforest transformation systems in Jambi, Sumatra, Indonesia Open
Panjaitan R, Drescher J, Buchori D, Peggie D, Harahap IS, Scheu S, Hidayat P. 2020. Diversity of butterflies (Lepidoptera) across rainforest transformation systems in Jambi, Sumatra, Indonesia. Biodiversitas 21: 5119-5127. The high rate of…
Rainforest conversion to smallholder plantations of rubber or oil palm leads to species loss and community shifts in canopy ants (Hymenoptera: Formicidae) Open
Currently, our understanding of the responses of ant communities under rainforest conversion to cash crops in SE Asia is based on comparisons of primary rainforests to large company-owned oil palm estates in Malaysian Borneo and a few comp…