Transportation companies are one of the sectors related to the development and economic development of countries in the world. Transportation companies are among the most important companies as the largest contributor to national development, resulting in the country's economy experiencing an increase along with the rise of increasingly sophisticated technology. The number of activities in the transportation services sector also has an impact that results in stock fluctuations. The purpose of this study was to determine the effect of Stock Trading Volume on Stock Returns with Stock Price as an intervening variable in transportation facilities listed on the IDX in 2017-2020. The population of this study is all transportation companies registered on the IDX in 2017-2020 as many as 47 companies. Sampling technique is determined by purposive sampling. Data analysis and hypothesis testing in this study using Partial Least Squares - Structural Equation Modeling (PLS-SEM). The results of direct influence hypothesis test using Smart PLS 3.0 application showed that Stock Trading Volume has a significant negative effect on Stock Price, Stock Trading Volume has a negative but not significant effect on Stock Return, Stock Price has a positive but not significant effect on Stock Return and Stock Trading Volume on Stock Return through Stock Price has a negative but not significant effect.

Pantai Blekok merupakan salah satu pantai dibagian barat Kabupaten Situbondo dengan ekosistem hutan mangrove yang ditumbuhi oleh beragam vegetasi tumbuhan dan termasuk dalam kawasan lindung serta berfungsi sebagai destinasi ekowisata. Keanekaragaman tumbuhan mangrove dapat dipelajari salah satunya melalui studi terhadap serbuk sari melalui kajian morfologi serbuk sari. Tujuan penelitian yaitu untuk mengetahui keanekaragaman morfologi serbuk sari tumbuhan mangrove di Kawasan Pantai Blekok. Pengambilan sampel dilakukan menggunakan metode jelajah. Preparasi serbuk sari dilakukan menggunakan metode asetolisis dan preparat serbuk sari dibuat untuk pengamatan morfologi. Analisis data morfologi serbuk sari dilakukan secara deskriptif. Hasil penelitian menunjukkan terdapat 10 spesies tumbuhan mangrove yaitu Excoecaria agallocha, Bruguiera gymnorrhiza, Avicennia marina, Avicennia alba, Sonneratia alba, Sonneratia caseolaris, Rhizophora mucronata, Rhizophora stylosa, Acanthus ilicifolius dan Acanthus ebracteatus. Morfologi serbuk sari pada spesies tumbuhan mangrove memiliki variasi dalam ukuran (kecil, sedang, besar), bentuk (prolate spheroidal, subprolate, prolate), apertura (tricolpate, triporate, tricolporate) dan ornamentasi eksin (reticulate, scabrate, perforate, verrucate).