Hill National Research Articles

Host preference explains the high endemism of ectomycorrhizal fungi in a dipterocarp rainforest.

Ectomycorrhizal (ECM) fungi are important tree symbionts within forests. The biogeography of ECM fungi remains to be investigated because it is challenging to observe and identify species. Because most ECM plant taxa have a Holarctic distribution, it is difficult to evaluate the extent to which host preference restricts the global distribution of ECM fungi. To address this issue, we aimed to assess whether host preference enhances the endemism of ECM fungi that inhabit dipterocarp rainforests. Highly similar sequences of 175 operational taxonomic units (OTUs) for ECM fungi that were obtained from Lambir Hill's National Park, Sarawak, Malaysia, were searched for in a nucleotide sequence database. Using a two-step binomial model, the probability of presence for the query OTUs and the registration rate of barcode sequences in each country were simultaneously estimated. The results revealed that the probability of presence in the respective countries increased with increasing species richness of Dipterocarpaceae and decreasing geographical distance from the study site (i.e. Lambir). Furthermore, most of the ECM fungi were shown to be endemic to Malaysia and neighbouring countries. These findings suggest that not only dispersal limitation but also host preference are responsible for the high endemism of ECM fungi in dipterocarp rainforests. Moreover, host preference likely determines the areas where ECM fungi potentially expand and dispersal limitation creates distance-decay patterns within suitable habitats. Although host preference has received less attention than dispersal limitation, our findings support that host preference has a profound influence on the global distribution of ECM fungi.

NATIONALIZING HISTORY AND THE CHALLENGE OF DISCORDANT TEMPORALITIES1

ABSTRACTChristopher Hill's National History and the World of Nations reminds us of the conjunctural moment of an emerging world market in the latter half of the nineteenth century and the promise it offered for vitalizing a “world history” yet to be written. More importantly, it supplies the silhouette of a radically different interpretive approach, formed by the force of a centrifugal perspective that—through its concentration on how France, the United States, and Japan were simultaneously motivated to construct representations of self‐identity in national narratives—converged to disclose the possibility of a wider world no longer held hostage to the geopolitical category of the “West.” Hill's account shows that the impulse behind the formation of national history employed different strategies to imagine a singular linear historical narrative of national identity that aimed both to remove the spectacle of coexisting, different, multiple temporalities and to weld large and regionally disparate populations into a single people who, in a new time, would be instructed to recognize themselves in the nation's story. In Hill's reckoning, national history in France, the United States, and Japan appears simply as another name for historical necessity that sought, through processes of naturalization and nationalization, to overcome the unstable and uneven relationship between state and capital but that failed to conceal the deeper reality of determinations demanded by the relations of capital at the local and international levels.

An Oligo-Miocene magpie goose (Aves: Anseranatidae) from Riversleigh, northwestern Queensland, Australia

ABSTRACT The magpie goose Anseranas semipalmata (Aves: Anseranatidae), the sole modern representative of the family, is endemic to Australia. The fossil record of Anseranatidae in Australia was until now restricted to Pliocene and younger sediments. Here we describe an anseranatid from the Oligo-Miocene Carl Creek Limestone in the Riversleigh World Heritage Property, Boodjamulla (Lawn Hill) National Park, in northwestern Queensland, as a new species and genus, based on a coracoid and two scapulae. These fossils extend the known age of the Anseranatidae lineage in Australia to about 25 million years ago. The fossil distribution of Anseranatidae now includes the Paleocene in North America, Eocene and Late Oligocene of Europe, and the Late Oligocene to earliest Miocene in Australia, indicating a globally widespread distribution of the family during the early-mid Tertiary.

Fort Rodd Hill and Fisgard Lighthouse National Historic Sites

Fort Rodd Hill and Fisgard Lighthouse National Historic Sites