This selection of papers highlights recent advances in our understanding of biodiversity and ecosystem functionality in aquatic environments. We hope this collection will bring you new inspiration and insights for your own research.

1. “The Convergence of Antibiotic Contamination, Resistance, and Climate Dynamics in Freshwater Ecosystems”
by Marcelo Pedrosa Gomes
Water 2024, 16(18), 2606; https://doi.org/10.3390/w16182606
Available online: https://www.mdpi.com/2073-4441/16/18/2606

2. “Using the Heavy Metal and Biotic Indices to Assess Ecological Quality in the Central Area of the East Sea, South Korea”
by Jian Liang, Chae-Woo Ma and Dae-Sun Son
Water 2024, 16(9), 1230; https://doi.org/10.3390/w16091230
Available online: https://www.mdpi.com/2073-4441/16/9/1230

3. “Impact of Microplastic on Freshwater Sediment Biogeochemistry and Microbial Communities Is Polymer Specific”
by Kristina M. Chomiak, Wendy A. Owens-Rios, Carmella M. Bangkong, Steven W. Day, Nathan C. Eddingsaas, Matthew J. Hoffman, André O. Hudson and Anna Christina Tyler
Water 2024, 16(2), 348; https://doi.org/10.3390/w16020348
Available online: https://www.mdpi.com/2073-4441/16/2/348

4. “Prokaryotic Microbial Diversity Analysis and Preliminary Prediction of Metabolic Function in Salt Lakes on the Qinghai–Tibet Plateau”
by Man Zhang, Jiangwa Xing, Qifu Long, Guoping Shen, Derui Zhu and Yongzhen Li
Water 2024, 16(3), 451; https://doi.org/10.3390/w16030451
Available online: https://www.mdpi.com/2073-4441/16/3/451

5. “Diversity of Macrophytes and Macroinvertebrates in Different Types of Standing Waters in the Drava Field”
by Mateja Germ, Žiga Tertinek, and Igor Zelnik
Water 2024, 16(8), 1130; https://doi.org/10.3390/w16081130
Available online: https://www.mdpi.com/2073-4441/16/8/1130

6. “The Responses of Cladoceran Communities to the Single and Simultaneous Effects of Environmentally Relevant Increases in Temperature and Phosphorus Concentration in Freshwater Ecosystems”
by Małgorzata Adamczuk
Water 2024, 16(2), 249; https://doi.org/10.3390/w16020249
Available online: https://www.mdpi.com/2073-4441/16/2/249

7. “Microplastics in the Danube River and Its Main Tributaries—Ingestion by Freshwater Macroinvertebrates”
by Jelena Stanković, Djuradj Milošević, Momir Paunović, Boris Jovanović, Nataša Popović, Jelena Tomović, Ana Atanacković, Katarina Radulović, Davor Lončarević and Maja Raković
Water 2024, 16(7), 962; https://doi.org/10.3390/w16070962
Available online: https://www.mdpi.com/2073-4441/16/7/962

8. “Karenia brevis and Pyrodinium bahamense Utilization of Dissolved Organic Matter in Urban Stormwater Runoff and Rainfall Entering Tampa Bay, Florida”
by Amanda L. Muni-Morgan, Mary G. Lusk and Cynthia A. Heil
Water 2024, 16(10), 1448; https://doi.org/10.3390/w16101448
Available online: https://www.mdpi.com/2073-4441/16/10/1448

9. “Ecological Assessment of Water Environment in Huizhou Region of China Based on DPSIR Theory and Entropy Weight TOPSIS Model”
by Weihua Deng, Xuan Li, Yanlong Guo, Jie Huang and Linfu Zhang
Water 2024, 16(18), 2579; https://doi.org/10.3390/w16182579
Available online: https://www.mdpi.com/2073-4441/16/18/2579

10. “How Daphnia magna Defends Itself against Predators: Mechanisms and Adaptations in a Freshwater Microcosm”
by Goran Kovačević, Petra Tramontana Ljubičić, Daniela Petrinec, Damir Sirovina, Maja Novosel and Davor Želježić
Water 2024, 16(3), 398; https://doi.org/10.3390/w16030398
Available online: https://www.mdpi.com/2073-4441/16/3/398

11. “Assessing the Impact of Weirs on Water Quality and Phytoplankton Dynamics in the South Han River: A Two-Year Study”
by Young-Hyo Kim, In-Hwan Cho, Ha-Kyung Kim, Eun-A Hwang, Byung-Hun Han and Baik-Ho Kim
Water 2024, 16(6), 833; https://doi.org/10.3390/w16060833
Available online: https://www.mdpi.com/2073-4441/16/6/833

12. “Assessing the Impacts of Changing Connectivity of Hydropower Dams on the Distribution of Fish Species in the 3S Rivers, a Tributary of the Lower Mekong”
by Peter-John Meynell, Marc J. Metzger and Neil Stuart
Water 2024, 16(11), 1505; https://doi.org/10.3390/w16111505
Available online: https://www.mdpi.com/2073-4441/16/11/1505

13. “Stream Algal Biomass Associations with Environmental Variables in a Temperate Rainforest”
by Elsa K. Toskey, Stephen M. Bollens, Gretchen Rollwagen-Bollens, Peter M. Kiffney, Kyle D. Martens and Bernard T. Bormann
Water 2024, 16(11), 1533; https://doi.org/10.3390/w16111533
Available online: https://www.mdpi.com/2073-4441/16/11/1533

14. “Reach-Scale Mapping of Surface Flow Velocities from Thermal Images Acquired by an Uncrewed Aircraft System along the Sacramento River, California, USA”
by Paul J. Kinzel, Carl J. Legleiter and Christopher L. Gazoorian
Water 2024, 16(13), 1870; https://doi.org/10.3390/w16131870
Available online: https://www.mdpi.com/2073-4441/16/13/1870

15. “Testing 16S Primers for Proper Identification of Cyanobacterial Communities in Small Water Bodies”
by Łukasz Łach, Nataliia Khomutovska, Jan Kwiatowski and Iwona Jasser
Water 2024, 16(10), 1357; https://doi.org/10.3390/w16101357
Available online: https://www.mdpi.com/2073-4441/16/10/1357