Dr. Natalie Graham

Principal Investigator

Email: grahamn@hawaii.edu

Office: STB

Research Area: Species Diversification Mechanisms / Ecological Networks / Biological Invasions / Biological Control

Research Interests

My aim is to develop efficient molecular biodiversity assessment pipelines that leverage genomic, spatial, and ecological information to capture global change phenomena of the world’s biotas.

I received my PhD from the Department of Environmental Science, Policy and Management at University of California, Berkeley after working with Dr. Rosemary Gillespie. I have a MS Biology from Sonoma State University where I worked with Dr. Derek Girman and Dr. Brian Fisher investigating a group of ants from Madagascar that have specialized across the island due to divergent colony reproductive strategies and variable microhabitats.

I am broadly interested in species diversification mechanisms of insular fauna and how communities change over time; in particular, how anthropogenic changes are altering species interactions and potentially driving rapid evolution. To investigate these questions I study arthropod communities in the Hawaiian archipelago that include endemic and native species as well as accidental and purposeful introductions. I exploit the natural occurrence of age-structured terrains on the archipelago that represent communities in an assembly continuum at sites dating from 44 years to 5.5 million years in geological age.

Current Projects

  • Biodiversity Dynamics of Arthropod and Plant Communities on an Island Archipelago using Quantitative NGS Metabarcoding and Literature Mining

  • Species Delimitation and Phylogeography of Endemic Hawaiian Parasitoid Wasps: Genus Spolas (Hymenoptera: Ichneumonidae)

  • Next-generation Sequencing for Assessment of Agent Evolution and Post-introduction Non-target Effects in Hawaiian Rainforest Communities

  • Timing of Colonization and Diversification of a Genus of Hawaiian Diurnal Web Building Spiders with Extensive Gene Flow

  • New Mosquito Blood Meal Analysis Method: Tracking Mosquito Predation and Community Interaction Using DNA Metabarcoding Honors thesis Blake Stoner-Osborne

  • Gut Microbiome Diversity of Native and Introduced Herbivorous Arthropods Feeding on Native or Introduced Plants Honors thesis Katherine Roger

Past Projects

  • Dietary and Spatial Niche Partitioning in Hawaiian Kleptoparasitic Spiders Honors thesis Monica Sheffer

  • Molecular Gut Content of Sulawesi Fanged Frogs Led by Ph.D. Candidate Jeff Frederick

Publications

Nanopore sequencing of long ribosomal DNA amplicons enables portable and simple biodiversity assessments with high phylogenetic resolution across broad taxonomic scale

H Krehenwinkel, A Pomerantz, JB Henderson, SR Kennedy, JY Lim, ...

GigaScience 8 (5), giz006

1692019Island ecology and evolution: challenges in the Anthropocene

NR Graham, DS Gruner, JY Lim, RG Gillespie

Environmental Conservation 44 (4), 323-335

842017Towards eradicating the nuisance of numts and noise in molecular biodiversity assessment

NR Graham, RG Gillespie, H Krehenwinkel

Molecular Ecology Resources 21 (6), 1755-1758

142021Ecological network structure in response to community assembly processes over evolutionary time

NR Graham, H Krehenwinkel, JY Lim, P Staniczenko, J Callaghan, ...

Molecular Ecology 32 (23), 6489-6506

112023Arthropods are kin: Operationalizing Indigenous data sovereignty to respectfully utilize genomic data from Indigenous lands

L Hutchins, A Mc Cartney, N Graham, R Gillespie, A Guzman

Molecular Ecology Resources 25 (2), e13822

62025Consistent accumulation of transposable elements in species of the Hawaiian Tetragnatha spiny-leg adaptive radiation across the archipelago chronosequence

H Yang, C Goubert, DD Cotoras, D Dimitrov, NR Graham, J Cerca, ...

Evolutionary Journal of the Linnean Society 3 (1), kzae005

52024Reference genome of the long-jawed orb-weaver, Tetragnatha versicolor (Araneae: Tetragnathidae)

SA Adams, NR Graham, AJ Holmquist, MM Sheffer, EC Steigerwald, ...

Journal of Heredity 114 (4), 395-403

52023Genetic basis of aposematic coloration in a mimetic radiation of poison frogs

T Linderoth, D Aguilar-Gómez, E White, E Twomey, A Stuckert, K Bi, A Ko, ...

bioRxiv, 2023.04. 20.537757

32023Phylogeography in Response to Reproductive Strategies and Ecogeographic Isolation in Ant Species on Madagascar: Genus Mystrium (Formicidae: Amblyoponinae)

NR Graham, BL Fisher, DJ Girman

Plos one 11 (1), e0146170

22016Environmentally associated colour divergence does not coincide with population structure across Lesser Antillean anoles

C Jung, JH Frederick, NR Graham, IJ Wang, C Fenton, K de Queiroz, ...

Biological Journal of the Linnean Society, blae047

12024Resolving Ecological, Evolutionary, and Global Change Effects on Biodiversity Dynamics: A Review and Empirical Study

NR Graham

University of California, Berkeley

2021Biodiversity Dynamics of Arthropod and Plant Communities on an Island Archipelago using Quantitative NGS Metabarcoding and Literature Mining

N Graham, H Krehenwinkel, RG Gillespie

AGU Fall Meeting Abstracts 2019, B21E-07

2019Machine learning to categorize unidentified arthropods as invasive or endemic using DNA sequence signatures without a complete reference library: Impact on island ecosystems

GK Roderick, JC Andersen, P Oboyski, N Davies, S Charlat, NR Graham, ...

Entomology 2018

2018Species Delimitation and Phylogeography of Endemic Hawaiian Parasitoid Wasps: Genus Spolas (Hymenoptera: Ichneumonidae)

NR Graham, RW Peck, RG Gillespie

INTEGRATIVE AND COMPARATIVE BIOLOGY 58, E327-E327