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Abstract Shifts in the composition of terrestrial plant communities could have significant effects on freshwater zooplankton due to changes in the quality of inputs of terrestrially derived dissolved organic matter (DOM). Leachate from native red maple (RM) and invasive Amur honeysuckle (AH) were used to explore the effects of DOM source on survival and growth of juvenile Daphnia ambigua. Prior research with both terrestrial and aquatic organisms indicates that AH-derived DOM has negative effects. Comparing bioassays in the presence and absence of algae with no additional DOM, RM- or AH-derived DOM, RM had stronger negative effects on both Daphnia survival and growth while AH only decreased growth. The negative effects seen in the presence and absence of algae provided evidence for both indirect and direct effects due to phytotoxicity and plant secondary compounds, respectively. DOM source may play a key role in regulating consumers in aquatic ecosystems. 

Abstract International research is necessary in aquatic sciences because water moves across borders. Historically, international collaborations have been useful in conducting oceanographic research programs, which span large distances and require several funding sources. Although valuable, international research can have unforeseen challenges to the unprepared researcher. Communication with an international collaborator and professional development training can mitigate these pitfalls. The Limnology and Oceanography Research Exchange Program (LOREX) is an opportunity for graduate students to gain experience developing international collaborations. The LOREX program aims to help graduate students develop connections and gain experience in international research. During the summer of 2019 and spring of 2020, 26 graduate students from 24 U.S. institutions will travel to one of six different host institutions to conduct a research project that they developed with an international collaborator. To prepare for their research experience, LOREX participants participated in training programs during the 2019 Aquatic Sciences Meeting in San Juan, Puerto Rico. The first group of LOREX graduate students will share their experience through social media and blog posts throughout their journey. Applications are now open for the second cohort of LOREX participants, and potential applicants are encouraged to contact potential collaborators to develop a research project.