Journal Articles

2026
Yasin, E., Gadallah, N., Siddig, A. et al. (2026): Projected effects of climate change on the potential environmental suitability of Vachellia seyal (Delile) P. J. H. Hurter in Sudan using MaxEnt species distribution modeling. Model. Earth Syst. Environ. 12, 267 https://doi.org/10.1007/s40808-026-02946-x

Gadallah, N. A. H., Gone Bi, Z. B., Ongoma, V., Younis, F. A. A., Alabi, T. A. F., Hassan, M. M. A., Khalifa, A. E. S. O., Diedhiou, A., & Siddig, A. A. H. (2026): Exploring the paths of carbon sequestration potential in Sudan's savanna woodlands: A scenario analysis. Journal of Arid Environments, 236:105633.

Adam, M. M. A., Yasin, E. H. E., Hasoba, A. M. M., Gadallah, N. A. H., Osman, A. A., Salih, Y. M. I., & Siddig, A. A. H. (2026): Tree diversity and carbon stock in University campuses in Sudan: a case study of the University of Khartoum’s Shambat campus. Arboricultural Journal, 1–12.

Yasin EHE, Gibreel HH, Siddig AAH, Musa FI, Sahoo UK and Czimber K (2026) Spatiotemporal changes in woody species composition, diversity, and regeneration reveal rapid degradation of a savanna woodland in Blue Nile state, Sudan. Front. For. Glob. Change 9:1835477. https://doi.org/10.3389/ffgc.2026.1835477

Ali, F. S. M., Siddig, A. A. H., Sommer, J. H., Borgemeister, C., & Biber-Freudenberger, L. (2026): Valuing ecosystem services in Sudan: A participatory study of the Okalma reserved forest. Trees, Forests and People, 23, 101139.

Siddig, A. A. H., Omer, A., M. Hasoba, A. M., Khalid, S., Hart, C., & Plotkin, A. B. (2026): Backing Ecologists to Succeed and Thrive (BEST) in Crisis Zones: Inspirations From the 2024 ESA Annual Meeting. The Bulletin of the Ecological Society of America, 107(1), e70056.

2025
Gadallah, N. A. H., Gone Bi, Z. B., Hakam, O., Siddig, A. A. H., & Ongoma, V. (2025): Modeling the impacts of climate change on the future distribution of the baobab tree (Adansonia digitata L.) in Sudan. Modeling Earth Systems and Environment, 11, 404.

Yasin, E. H. E., Siddig, A. A. H., Diab, E. E., & Czimber, K. (2025): Evaluating the efficiency of two ecological indices in monitoring forest degradation in the drylands of Sudan. Remote Sensing, 17(13), 2298.

Hasoba, A. M. M., Siddig, A. A. H., Czimber, K., Omer, A., Gadallah, N. A. H., Adam, M. M. A., & Barker Plotkin, A. (2025): Synthesizing knowledge about tree diversity, density, and distribution in the savanna woodlands of Sudan. Trees, Forests and People, 19, 100906.

Gadallah, N. A. H., Gone Bi, Z. B., Ongoma, V., Omer, A., Ahmed, A. E. M., Hasoba, A. M. M., & Siddig, A. A. H. (2025): Investigating tree diversity and structure across varying land cover classes and altitudes in the savanna woodlands of Sudan. Frontiers in Forests and Global Change, 8, 1581188.

Elmardi, M. E. M., Hassana, M. M. A., Ibrahim, M. E. A., Hamid, A. A., & Siddig, A. A. H. (2025): Impact of fire frequency on tree diversity in Dinder National Park (DNP), Sudan, using geospatial technology. Journal of Geoscience and Environment Protection, 13(3), 168–183.

2024
Ghoraba, S. M. M., Suárez, E. L., Almahasheer, H., Siddig, A. A. H., Nagi, H. M. H., & Valderrábano, M. (2024): IUCN Red List of Ecosystems, mangroves of the Red Sea and Gulf of Aden. EcoEvoRxiv.

Dafa-Alla, M. D., Gibreel, H. H., Siddig, A. A. H., Yagoub, Y. E., Abdelkarim, H. A., Saeed, K. H. T., & Abuelbashar, A. I. (2024): Exploring the diversity of trees and the ecological value of mountain forests in the Blue Nile region of Sudan. Open Journal of Ecology, 14(3), 245–256.

2023
Koko, S., Siddig, A. A. H., Yasin, E. E., Gadallah, N. A. H., Adam, M. M. A., Hasoba, A. M. M., & Mohammed, A. (2023): Do observations during patrolling trips detect changes in wildlife presence & diversity in national parks? Open Journal of Ecology, 13(11), 794–805.

Elzaki, I. A. E., Siddig, A. A. H., Yasin, E. H. E., Attaelmnan, A. A., Gadallah, N. A. H., Hasoba, A. M. M., Nasreldeen, M. A., Yagoub, Y. E., & Czimber, K. (2023): Effect of simulated drought and rainfall fluctuation on seedling growth of two savannah tree species in Sudan: An experimental exploration. Acta Silvatica & Lignaria Hungarica, 19(1), 37–50.

Awadalla Abass, F., Mubarak Khugali, S., Mohammed Ahmed, N., Laamrani, A., Elhadi, E., Siddig, A., & Kouassi, E. (2023): Estimating ecological characteristics and carbon stock in uneven-aged plantations of Acacia senegal L. in the savannah woodlands of Sudan. Journal of Environmental Protection, 14(5), 404–418.

Bai, Y., Dai, Q., Hai, J., Wang, Q., Liao, D., Liu, G., Wang, Y., Huang, J., Zhang, R., Siddig, A. A. H., Bao, W., & Yang, G. (2023): Manganese slag amendment reduces greenhouse gas emissions from paddy soil. Atmosphere, 14(1), 131.

2022
Dafa-Alla, D. M., Abuelbasher, A., Gibreel, H. H., Yagoub, Y. E., Siddig, A. A. H., & Hasoba, A. M. M. (2022): Assessing tree diversity in Jebel Elgerri forest reserve in the Blue Nile state, Sudan. Journal of Forest and Environmental Science, 38(3), 174–183.

Abuelbashar, A. I., Dafa-Alla Ahmed, D. M., Siddig, A. A. H., Yagoub, Y. E., & Gibreel, H. H. (2022): Analysis of composition and diversity of natural regeneration of woody species in Jebel Elgerri dry land forest east of Blue Nile state, Sudan. Journal of Forest and Environmental Science, 38(2), 1–9.

Siddig, A. A. H., & Hasoba, A. M. M. (2022): Charismatic or abundant species are not always good indicators for monitoring biodiversity & ecosystem changes. Ecology & Evolutionary Biology, 7(2), 14–17.

Siddig, A. A. H., & Ellison, A. M. (2022): How is the coup impacting science and scientists in Sudan? OSF Preprints.

Gadallah, N. A. H., Taha, I. S. A., Hano, A. I. A., Siddig, A. A. H., & Bo, H. J. (2022): Integrated approach for assessment and monitoring of forest conditions in the drylands of Sudan. Arid Ecosystems, 12(2), 142–153.

2021
Abdelkarim, H. A., Dafa-Alla, D. M., Yagoub, Y. E., & Siddig, A. A. H. (2021): Composition, structure, and regeneration status of Hyphaene thebaica (L.) Mart. natural forests in the dry lands of Sudan. Agriculture & Forestry Journal, 5(2), 82–88.

2020
Hasoba, A. M. M., Siddig, A. A. H., & Yagoub, Y. E. (2020): Exploring the diversity of trees and the stage structure of the Nuara reserved savanna woodland in southeastern Sudan. Journal of Arid Land.

Siddig, A. A. H., Richardson, J. S., & Dormann, C. F. (2020): Drought amplifies the impacts of salt pollution in pond ecosystems: An experimental exploration. Fundamental and Applied Limnology, 194(1), 1–9.

2019
Siddig, A. A. H. (2019): Why is biodiversity data-deficiency an ongoing dilemma in Africa? Journal for Nature Conservation, 50, 125719.

Adam, M. M. A., Hano, A. I., Yagoub, Y. E., Siddig, A. A. H., Gibreel, H. H., Musa, O. S., & Mohammed, K. S. (2019): Assess the status of urban trees and their role in environmental services in Umdorman locality, Sudan. American Journal of Environment and Sustainable Development, 5(2), 22–27.

Mohammed, K. S., Yagoub, Y. E., Siddig, A. A. H., Musa, O. S., Ibrahim, M. E. A., & Adam, M. M. A. (2019): Detection and monitoring of forest fires in Dinder National Park, Sudan, during 2010-2014 using remote sensing technology. American Journal of Environment and Sustainable Development, 4(1), 1–5.

Siddig, A. A. H., Ellison, A. M., & Ochs, A. (2019): Do terrestrial salamanders indicate ecosystem changes in New England forests? Forests, 10(2), 154.

2018
Yagoub, Y. E., Li, Z. Q., Siddig, A. A. H., Musa, O. S., & Anjum, M. N. (2018): Glacier mass-balance variation in China during the past half-century. Journal of Geoscience and Environment Protection, 6(5), 37–58.

2017
Yagoub, Y. E., Musa, O. S., Siddig, A. A. H., Bo, Z., Zhongqin, L., & Feiteng, W. (2017): Assessing the impacts of land use on vegetation cover in eastern Sudan. International Journal of Research in Agricultural Science, 4(2), 70–76.

Siddig, A. A. H. (2017): Pond ecosystems in the era of environmental changes. Branchlines - The University of British Columbia's Forestry Newsletter, 28(1), 20.

Ochs, A., & Siddig, A. A. H. (2017): Response of red-backed salamanders (Plethodon cinereus) to changes in hemlock forest soil driven by invasive hemlock woolly adelgid (Adelges tsugae). Environments, 4(1), 8.

2016
Siddig, A. A. H., Ellison, A. M., & Mathewson, B. G. (2016): Assessing and predicting the impacts of the decline of eastern hemlock (Tsuga canadensis) stands on the occurrence of terrestrial amphibians in New England forests. Ecosphere, 7(11), e01574.

Siddig, A. A. H., Ellison, A. M., Ochs, A., Villar-Leeman, C., & Lau, M. K. (2016): How do ecologists select and use indicator species to monitor ecological changes: Insights from 14 years of publication in Ecological Indicators. Ecological Indicators, 60, 223–230.

2015
Siddig, A. A. H., Ellison, A. M., & Jackson, S. (2015): Calibrating abundance indices with population size estimators of red back salamanders (Plethodon cinereus) in a New England forest. PeerJ, 3, e952.

2014
Siddig, A. A. H. (2014): Biodiversity of Sudan: Between the harsh conditions, political instability, and civil wars. Biodiversity Journal, 5(4), 545–555.


Books and Book Chapters

2024
Gadallah, N. A. H., & Siddig, A. A. H. (2024): Space and ground-based earth observations for hazards valuation and disaster risk management in the era of climate change. In Revolutionizing Earth Observation - New Technologies and Insights. IntechOpen.

Yasin, E. H. E., Siddig, A. A. H., & Czimber, K. (2024): Forests at the crossroads: Biodiversity conservation in the era of climate change. In Sustainable Forest Management - Surpassing Climate Change and Land Degradation. IntechOpen.

2023
Yasin, E. H. E., Siddig, A. A. H., Deiab, E. E., Czimber, K., Hasoba, A. M. M., & Osman, A. (2023): Forest degradation in dryland ecosystems of Sudan: Review of the causes, consequences, assessment methods, and potential solutions. In Conservation, Exploitation, and Restoration of Mountain Ecosystem. IntechOpen.

2018
Siddig, A. A. H., Abdel Magid, T. D., El-Nasry, H. M., Hano, A. I., & Awad, A. (2018): Biodiversity of Sudan. In T. Pullaiah (Ed.), Global Biodiversity, Volume 3: Selected Countries in Africa. Apple Academic Press (distributed by CRC Press).


Conference & Symposia Contributions

2026
Siddig, A. A. H. (October 7, 2026): Ecological Data-Deficiency in Crisis Zones, AGYA Workshop on Preservation of Knowledge in Crisis Zones: Insights from Suda, Ethiopia. (Oral presentation)

2024
Siddig, A. A. H. (August 7, 2024): Building successful mentoring programs for young ecologists in times of crisis. Inspire Session Talk, 104th Annual Meeting of the Ecological Society of America, USA. (Oral presentation)

2023
Siddig, A. A. H. (February 27, 2023): Why is long-term ecological research (LTER) matter in Africa? DAAD Climap Africa - Biodiversity, Ecosystems and Forests Working Group Summit, Benin. (Oral presentation)

Siddig, A. A. H. (January 23, 2023): Dealing with the impacts of climate change on the biodiversity of drylands in the era of data deficiency. Multifunctional Forest Management as Active Climate Protection Seminar Programme, University of Gottingen, Germany. (Oral presentation)

2022
Siddig, A. A. H. (September 26, 2022): Impacts of climate change on biodiversity & ecosystem services: Observed patterns & knowledge gaps. Sudan International University (SIU) Conference on Climate Change, Sudan. (Oral presentation)

Siddig, A. A. H. (March 8, 2022): Climate change: Evidence, causes, potential ecological impacts, & needed actions. Ecological Monitoring Workshop, Wildlife Research Center, Sudan. (Oral presentation)

2021
Siddig, A. A. H. (July 30, 2021): Ecological & biodiversity data-deficiency in Africa: Causes, consequences and potential directions. Monthly Seminar of the DAAD's Climap Africa Initiative – Biodiversity Working Group. (Oral presentation)

2020
Siddig, A. A. H. (January 11, 2020): Climate change: Indicators, impacts & management options. Organization Day of the Sudan Youth Organization for Climate Change (SYOCC) - Khartoum Office, Sudan. (Oral presentation)

2019
Siddig, A. A. H. (June 15, 2019): Building resilience and developing long-term monitoring plans for the vulnerable forest ecosystems in sub-Saharan Africa in the era of environmental changes. DAAD P.R.I.M.E. Alumni Conference "5 Years of P.R.I.M.E. – Researcher Training for Successful Career Paths," Bonn, Germany. (Poster presentation)

2018
Ochs, A., & Siddig, A. A. H. (August 2018): The effectiveness of terrestrial amphibians as indicator species for long-term monitoring of ecosystem changes in eastern USA forests. Amphibians and Reptiles Conference, Connecticut, USA. (Poster presentation)

2015
Siddig, A. A. H., Ochs, A., Villar-Leeman, C., & Johnson, S. (March 2015): Does decline of hemlock forests affect the demographic structure of red back salamanders in Harvard Forest? 26th Annual Harvard Forest Ecology Symposium, Harvard Forest, Harvard University, USA. (Poster presentation)

2014
Ochs, A., Villar-Leeman, C., & Siddig, A. A. H. (September 2014): Salamanders as an indicator species for New England hemlock forest decline. National Conference of the Council of Undergraduate Research (CUR) on the Research Experience for Undergraduate (REU), Washington, D.C., USA. (Poster presentation)

Ellison, A. M., Patel, M. V., & Siddig, A. A. H. (September 2014): Recipes for success in STEM: The Harvard Forest Summer Research Program in Ecology. National Conference of the Council of Undergraduate Research (CUR) on the Research Experience for Undergraduate (REU), Washington, D.C., USA. (Poster presentation)

Siddig, A. A. H. (April 2014): Long-term ecological monitoring: Opportunities and importance in the future of biodiversity conservation in Africa. 10th Annual Symposium of the Center for Tropical Ecology and Conservation (CTEC), Antioch University New England, Keene, NH, USA. (Oral presentation)

Siddig, A. A. H. (April 2014): Dry Ecosystems Restoration Index (DERI): A system for developing and monitoring the habitat restoration programs in dry lands. Conference on Designing for Success: Ecological Restoration in Times of Change, Society for Ecological Restoration, New England Chapter, and the Conway School of Landscape Design, Hampshire College, Amherst, MA, USA. (Poster presentation)

Siddig, A. A. H., Ellison, A. M., Leitner, J., & Balint, A. (March 2014): The state of terrestrial amphibians at Harvard Forest's Hemlock Removal Experiment (HF-HeRE) in 2013. 25th Annual Harvard Forest Ecology Symposium, Harvard Forest, Harvard University, USA. (Poster presentation)

Siddig, A. A. H. (February 20, 2014): Biodiversity of Sudan: Status, conservation challenges, and urgent management and research needs. I invited a seminar speaker to Harvard Forest, Harvard University, USA. (Oral presentation)